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General Category => Rom things => Topic started by: MacEFIRom on September 07, 2011, 03:57:45 AM



Title: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: MacEFIRom on September 07, 2011, 03:57:45 AM
I was asked by a couple of fellow forum members to write a firmware tool for the iMac4,1 and iMac5,1. This model was the first iMac introduced with an Intel processor in 2006, and they later updated the platform with Core 2 Duo CPUs. The iMac4,1 came with the Core Duo processor, which was limited to 2GB of RAM, and was only a 32 bit CPU. The iMac5,1 came with a Core 2 Duo CPU, and can take 4GB of RAM, and is a 64 bit platform, even though the kernel can only boot in 32 bit due to 32 bit EFI. A lot of people have upgraded their CPUs, but are still stuck with the 2GB RAM limit and have to hack Lion to get it to run. This firmware upgrade removes the 2GB RAM limit, properly identifies the Core 2 Duo CPUs, and Lion will install and run just fine. The core file set has been tested by a forum member (Thanks Martin), and while I don't have an actual iMac to test on, the files created for the firmware upgrade perfectly match the core file set that has already been tested. As usual, you can upgrade or downgrade at will. If you have a CPU in an iMac5,1 that isn't supported in the iMac4,1, the system will not boot after the update until a compatible CPU is installed. The program checks the iMac model and will only install the iMac5,1 firmware on an iMac4,1, or the iMac4,1 firmware on an iMac5,1, whichever is appropriate. If you have an iMac5,1 the program will warn you about downgrading, but will still allow the firmware update. The download does not contain any firmware updater files or image files. The program creates a small RAM disk, downloads the needed files, copies all of the scripts to the RAM disk, and then runs the scripts. Everything is left on the RAM disk for you to look at and study, if needed.

There have also been requests for a MacMini1,1 and MacMini2,1 firmware tool, and although there doesn't appear to be a MacMini2,1 firmware image in any of the Apple provided downloads, I'm looking into the feasibility of extracting an image using a tool in the rEFIt package, so stay tuned.

I hope you enjoy the benefits of extending the value of your iMac4,1, or being able to change your system back and forth for development purposes.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: epromer on September 07, 2011, 04:54:49 AM
Thx a lot! I have a mini late2006 and I'm eagerly to remove the 2GB of RAM limit. Keep going!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: SummerSoFar on September 08, 2011, 04:38:09 AM
Thank you! Thank you! Thank you!  ;D ;D ;D

You just breathed new life into my iMac 4,1 (upgraded to Core 2 Duo and a SSD).

I continue to be amazed how my 5+ year old machine continues to be a relative speed demon with minimal ongoing effort and cost. Your awesome little tool extends that even further.

Like I said -- Thank you!

I will make the firmware upgrade this weekend, and will report how it goes.

Just curious -- I also own a MacBook 1,1 that also has the 2GB limit and is not supported by Lion. I know that the Core Duo proc is not upgradable, but do you suppose that the firmware on it could also be upgraded to lift the memory limit and/or fool the Lion installer???

*********************************

Edit 09/10/2011

I am very pleased to report that my iMac is working perfectly post upgrade. Woot woot!

Some thoughts:
I first had tried running the tool while in Safe Mode, thinking that would be best to minimize any potential conflicts. But upon install and reboot no EFI upgrade was performed. Not sure why that is, but after performing the install again in regular boot mode, closing all open apps and disabling Little Snitch beforehand, upon reboot the firmware upgrade process kicked off as expected.

The machine booted to the desktop, and System Prefs now successfully reported it as a iMac5,1. However, both the network and the airport cards were no longer recognized (all other hardware looked okay). Luckily, performing another reboot solved this issue.

Just to be safe, at that point I used Kext Utility to clear the kextcache, and ran Applejack in SU mode to rebuild permissions and clear other caches. I also fired up Hardware Monitor -- all sensors and fans continued to be well within spec.

Everything seems to be working beautifully. There was an annoying bug with these machines that prevented the Mac Aluminum keyboard from working at startup and in SU mode, and now that is even fixed!

I have not yet tried purchasing or installing Lion, or installing 4gb of memory, but I only assume that those will work now without issue as well.

The only strange and new activity I see is a hidden volume called FirmwareSyncd getting automatically mounted and unmounted on occasion. Any idea what this is, and what it is doing?

Thanks again to MacEFIRom for providing a bloody brilliant tool to extend the life of our 1st gen Intel iMacs. Your time and talent in doing so is greatly appreciated!

And I'll sheepishly ask again -- Is there any hope in getting my Macbook1,1 Lion compatible as well?   ;)

*********************************

Edit 09/19/2011

Today I was successful in installing 4GB of RAM, with System Profiler recognizing 4GB installed.

Still have not tried installing Lion, however more recent reports later in the thread make it seem like that may still be a challenge to do...  ???

*********************************

Edit 10/02/2011

Confirmed that MAS still does not allow the purchase of Lion.

I assume that the (overpriced) retail copy of Lion (on the flash drive) would work.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on September 10, 2011, 06:05:39 PM
I confirm the Firmware 4GO upgrade on my iMac early 2006 20". This is a milestone MacEfiRom!

Just see the picture to have proof!

For the Macbook and Macbook Pro 1.1, a firmware upgrade will allow ram upgrade but not for cpu. Cpu is soldered on the logicboard.

 :o 17 september news :

Upgraded my cpu to a C2D T5600 which is cost less than the t7xxx series cpu's. This bring all the C2D goodness to my iMac with little less L2 cache.

Attemping to install Lion on my iMac updated with this firmware update. Lion installer tell me the os cannot be installed on this computer. Add my logicboard model (Mac-F42787C8 DVT) in all the plist's on /system/library/coreservice/ but don't work.  I suppose we need to modify the logicboard model embedded which is embedded in the EFI. This is the next step.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: nshuman on September 12, 2011, 06:14:47 PM
Wow, I have a nice 20 inch iMac 2006 that is stuck at 2GB of ram and 32 bit. I guess I have to look into all of this. Time to search for a CPU...


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: wpnelson44 on September 12, 2011, 09:41:29 PM
Is is possible to modify this firmware update to work on an iMac5,2 as the 5,2 only accepts 2 megs ram.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: takadkc on September 13, 2011, 03:35:32 AM
I successfully upgraded my imac from 4,1 to 5,1, and from core duo to core 2 duo.  See below.  Yet, when I go to the Apple Store to try and download Lion, it says my computer is not compatible and refuses to download.  Is it checking something besides model identifier = 5,1?

thanks!


Hardware Overview:

  Model Name:   iMac
  Model Identifier:   iMac5,1
  Processor Name:   Intel Core 2 Duo
  Processor Speed:   2.33 GHz
  Number Of Processors:   1
  Total Number Of Cores:   2
  L2 Cache:   4 MB
  Memory:   2 GB
  Bus Speed:   667 MHz
  Boot ROM Version:   IM51.0090.B09
  SMC Version (system):   1.1f5
 


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Newflesh on September 13, 2011, 05:06:18 PM
I successfully upgraded my imac from 4,1 to 5,1, and from core duo to core 2 duo.  See below.  Yet, when I go to the Apple Store to try and download Lion, it says my computer is not compatible and refuses to download.  Is it checking something besides model identifier = 5,1?

thanks!


Hardware Overview:

  Model Name:   iMac
  Model Identifier:   iMac5,1
  Processor Name:   Intel Core 2 Duo
  Processor Speed:   2.33 GHz
  Number Of Processors:   1
  Total Number Of Cores:   2
  L2 Cache:   4 MB
  Memory:   2 GB
  Bus Speed:   667 MHz
  Boot ROM Version:   IM51.0090.B09
  SMC Version (system):   1.1f5
 

It is because we keep the same board ID(i find it with geekbench) :

Apple Computer, Inc. Mac-F42787C8 PVT

Everything work fine for me.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Newflesh on September 13, 2011, 05:08:29 PM
I confirm the Firmware 4GO upgrade on my iMac early 2006 20". This is a milestone MacEfiRom!

Just see the picture to have proof!

For the Macbook and Macbook Pro 1.1, a firmware upgrade will allow ram upgrade but not for cpu. Cpu is soldered on the logicboard.

Are you sure that the system really use 4Go(activity monitor for proof)

Thanx


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: katman on September 14, 2011, 12:11:54 AM
Is is possible to modify this firmware update to work on an iMac5,2 as the 5,2 only accepts 2 megs ram.
I'm in the same boat. I have a late 2006, 5,2, 17" 1.83ghz, school edition. I am running 10.7.2 and bootcamp just fine. I would like to add 4or even 8 gig of ram. On another note, is there a way to increase the ram allocated to the 950 video so that I can run Final Cut Pro?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: stinkymr on September 14, 2011, 10:48:40 PM
Might this be possible for the iMac4,2 as well, please? Thank you!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: timalf on September 17, 2011, 08:56:54 PM
I successfully upgraded my imac from 4,1 to 5,1, and from core duo to core 2 duo.  See below.  Yet, when I go to the Apple Store to try and download Lion, it says my computer is not compatible and refuses to download.  Is it checking something besides model identifier = 5,1?

thanks!


Hardware Overview:

  Model Name:   iMac
  Model Identifier:   iMac5,1
  Processor Name:   Intel Core 2 Duo
  Processor Speed:   2.33 GHz
  Number Of Processors:   1
  Total Number Of Cores:   2
  L2 Cache:   4 MB
  Memory:   2 GB
  Bus Speed:   667 MHz
  Boot ROM Version:   IM51.0090.B09
  SMC Version (system):   1.1f5
 

It is because we keep the same board ID(i find it with geekbench) :

Apple Computer, Inc. Mac-F42787C8 PVT

Everything work fine for me.

So is there any way to get a Lion compatible board ID in there or am I screwed once again trying to get Lion installed?!
...and btw, thanks MacEFIRom for the great utility, that at least for a while brightened up my evening :)


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: netkas on September 18, 2011, 09:24:01 AM
boot your mac with chameleon, you can fake there you board-id via smbios.plist, check another thread for chameleon on mac


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on September 18, 2011, 04:00:32 PM
It is possible to mod the embedded logicboard id?  ;D

I'm able to boot my hackintosh drive on Lion with last chameleon. But I lost accelerated video. My Ati X1600 is now downgraded to 6MB!  :-\



Look at the prtscrn
 
Another test: I'm able to boot on usb key with Lion Install files on it with Snow Leopard Kernel. With the Lion one, flashed iMac won't boot on it.


Title: MacBook2,1 - Any chance to boost it to 3,1?
Post by: cpl593h on September 21, 2011, 07:11:27 AM
Hello,

The MacBook2,1 has a C2D CPU. Its EFI implementation is 32-bit though (better explained here (http://www.logicalvue.com/2009/10/installing-window-7-x64-on-a-macbook-pro-using-bootcamp/)) and it prevents, amongst other things, a smooth installation of Windows 7 64-bit (you have to remaster the DVD before it even boots).

It looks like MacBook3,1 (Santa Rosa) have a far better EFI implementation. I was wondering if what you've done for older iMacs would be achievable for older MacBooks too (I understand that MacBook1,1 is not possible due to the soldered CPU, but MacBook 2,1 has the right CPU and just suffers from an ugly EFI implementation).

Thank you!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Czarembo on September 22, 2011, 04:20:37 PM
I'm looking forward to being able to install Lion on my Mac-Mini.  How much ram will the MacMini1,1 and MacMini2,1, rom update permit?  is the limitation 4GB?  Thanks so much for attempting this!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: pieterg on September 23, 2011, 10:12:00 PM
Hi,

It crashed on my iMac 4,1 on Tiger. Can you explain what I'm doing wrong?

Date/Time:       2011-09-23 23:09:04.898 +0200
OS Version:      Mac OS X 10.5.8 (9L31a)
Report Version:  6
Anonymous UUID:  xxx

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  unknown required load command 0x80000022

--

ROM-version:   IM41.0055.B08
SMC-version:   1.1f5


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on September 27, 2011, 10:54:09 PM
I got a similare error message under Leopard. Successfuly worked under Snow Leopard. Perhaps a question of library.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Ashgrove on October 29, 2011, 05:11:12 PM
Well, this is interesting.

I have an iMac 5,1. It's the 17" model with a 2Ghz C2D processor. It has 4GB of RAM installed (of which it uses only 3, but it runs a little faster). Running 10.7.2 with all the updates.

I was directed from another forum to this thread and thought it would be a good way to get all my RAM recognized and used, and perhaps install more. So last night I downloaded the app, did the EFI downgrade, and now my iMac is a vegetable. It just sits there with a dark screen and does not respond to any commands.

Any ideas?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: lasertony on November 17, 2011, 04:19:21 PM
@Ashgrove
I think it is physically impossible for the 2006 iMac to adress more than 3 Gb of memory.  The performance you had with your 5,1 logic board and 4Gb installed (of which 3 usable) was 'as good as it gets' for these iMacs...  It is only for the 4,1 logic board that it becomes interesting to use this utility.  You can upgrade memory above the 2 Gb limit of this board and use the 5,1's limit which is 3Gb (4 installed).  You can also use it to make your life easier installing Lion.  The utility lets you 'downgrade' a previously upgraded 4,1 board back to its original state.  I don't think it was ever the intention to downgrade an original 5,1 as this makes upgrading to Lion impossible...
As far as I understand things I suppose you now have a 4,1 logic board (at least according to the firmware) that doesn't support your Core2Duo processor...  Maybe you can get it to boot by installing a Core Duo processor ?

I, on the otherhand, need to repair my late 2006 imac which has issues with the GPU.  I can't find a 2,16Ghz C2D logic board without spending a small fortune.  I can find cheap Core Duo logic boards, however.  So I am planning to find a good one of those, put my 2,16 C2D processor on it and upgrade it to 5,1.  The problem is that I am already running Lion.  I already did the upgrade because my previous logic board was original 5,1 and upgraded to Lion without any problems. 
Will my iMac boot up when I install the replacement logic board ?  Do I need to alter PlatformSupport.plist with the replacement logic board's ID ?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Ashgrove on November 17, 2011, 05:39:17 PM
@lasertony

You're absolutely right. I found out the hard way that the utility would nuke my board. Serves me right for not reading the whole disclaimer.

As for your new board, yes, you will have to delete PlatformSupport.plist in order for it to boot, because it checks the board ID, not the EFI. My Core Solo mini is upgraded to a T7200 Core 2 Duo and runs Lion like a dream. I installed it from my iMac via Target Disk Mode, and then deleted the file.

It upgraded fine to 10.7.1, but the 10.7.2 upgrade installed PlatformSupport.plist back, so it wouldn't boot from the internal HDD. Fortunately I keep an external backup drive that's updated nightly via SuperDuper, so I booted from that one, deleted the file in the internal, and was back in business. You can do that, and won't have a problem.

There is a place in Fremont, CA, called DT&T, where they replace your logic board for a song. I'm sending them my iMac. They have been taking care of the Macs I can't fix myself (or that I destroy ;-) for years. They are super cheap and very reliable. Mind you, I live in Florida, and even with shipping back and forth it's cheaper than fixing it here...

And I have seen logic boards for your model on eBay for around $100-$150. Check it out.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: lasertony on November 17, 2011, 06:59:40 PM
@Ashgrove
Thanks for the reply.
Is it best to just delete PlatformSupport.plist or can I just insert the replacement board's ID into the file ?

As for a logic board:  I've checked ebay several times in the last few weeks... The board I need isn't there.  (Are things ever there when you really need them ? ;-))  I'm sure that when I finish getting the Core Duo board installed a good Core2Duo board will appear on ebay within minutes :-)  Just my luck...

DT&T sounds nice.  Unfortunately I'm all the way over in Europe...  If they could send me a cheap board, that would be great.  I've had the old board out several times to try and fix the GPU problem (new thermal paste, etc) so I'm getting used to tearing the iMac apart...  Sending the whole thing over to California will be too expensive, I think...



Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Ashgrove on November 17, 2011, 07:46:32 PM
@lasertony

Yeah, I see why DT&T wouldn't work out for you, LOL. Well, look at the bright side: if a C2D logicboard shows up right after you install yours, you already have a working iMac anyway. And if the firmware tool works as well as they say, it'll all wash out.

As for the PlatformSupport.plist file, it might be possible to edit it the way you say. I haven't read any reports about it working, though.

And (while I'm no advocate of violence) I find that sometimes the bazooka-at-close-range approach works best. Nute the b*****d. It serves no purpose anyway, other than making your life miserable.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: davymoseley on November 18, 2011, 03:49:58 AM
I successfully upgraded my iMac4,1 (Early 2006 20 inch) last month. I did the firmware upgrade to iMac5,1, upgraded the original T2500 to a T7200 and installed 4 gigs of 667MHz DDR2 RAM, and popped in a 1TB WD Black HDD. Installed Lion under Target disk mode as there is no way to change the board ID, and this is easier for me than hacking the installer image. It's been working great. A real screamer. My only problem is System Profiler reports 4 gigs of RAM, but Activity Monitor only recognizes 3 gigs. Also, I had to buy and install HDD Fan Control to control fan noise. Post Lion install, my iMacs internal fans blow at near full speed. I'm thinking I may not have gotten the temp sensor affixed to the hard drive good enough. I'll check that the next time I have time to open the iMac back up, but since it's kind of a pain I'm not gonna worry about it. Just wondering if anyone else has had trouble with fan noise after installing Lion on an upgraded Mac. Thanks for all the information. Great thread.  8)


Title: BreXPressPost: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: brex on December 02, 2011, 09:36:20 PM
Tanks XL to NETKAS --- excellent work !


Title: BreXPressThanks to MacEFIRom !!!
Post by: brex on December 02, 2011, 09:54:27 PM
Direct THANKS to MacEFIRom --------------- brexxxxxxxxxxxxxxxxxxxxxxxxxxxxx


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Cardo45 on December 12, 2011, 06:07:43 PM
boot your mac with chameleon, you can fake there you board-id via smbios.plist, check another thread for chameleon on mac

Is this or any firmware upgrade necessary for upgrading the processors in a 2010 5,1 macro 2xE5620 Quad 2.4ghz to either of the 2010 5,1 hex processors 5650 or 5670 or 5690?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: lwb250` on December 15, 2011, 04:28:01 PM
I successfully upgraded my iMac4,1 (Early 2006 20 inch) last month. I did the firmware upgrade to iMac5,1, upgraded the original T2500 to a T7200 and installed 4 gigs of 667MHz DDR2 RAM, and popped in a 1TB WD Black HDD. Installed Lion under Target disk mode as there is no way to change the board ID, and this is easier for me than hacking the installer image. It's been working great. A real screamer. My only problem is System Profiler reports 4 gigs of RAM, but Activity Monitor only recognizes 3 gigs. Also, I had to buy and install HDD Fan Control to control fan noise. Post Lion install, my iMacs internal fans blow at near full speed. I'm thinking I may not have gotten the temp sensor affixed to the hard drive good enough. I'll check that the next time I have time to open the iMac back up, but since it's kind of a pain I'm not gonna worry about it. Just wondering if anyone else has had trouble with fan noise after installing Lion on an upgraded Mac. Thanks for all the information. Great thread.  8)

Ditto!

I replaced the CD 2.0G processor in my 20" iMac 4,1 last week with a T7600 and it worked like a champ.  I just found the EFI update last night and installed it so now it will recognize 3 gigs of RAM. I have a disk image of Lion with the modified plist file so it will ignore the machine/board numbers, so once everything was back together I just booted from a system CD and installed the image on to the new drive.

I also did the hard drive upgrade from the stock 250GB drive to a 750GB WD.  I did not, however, run the SMC fan control.  I wish I had, as the heat load killed the drive within a week.  I didn't even think about it until it was too late. >:(

So as a warning to those who might swap out the stock drive for a larger one, be sure to install the SMC fan control utility and monitor those temperatures!

LWB250


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Excalibur360 on January 23, 2012, 04:36:44 PM
Hi, I'm very happy to read that I can do something with memory limitation on my iMac 20'' early 2006.  Where can I get this Firmware utiliy Tool ?

Thanks,

Martial


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: slite on February 04, 2012, 12:02:46 AM
Hi, I'm very happy to read that I can do something with memory limitation on my iMac 20'' early 2006.  Where can I get this Firmware utiliy Tool ?

Thanks,

Martial

It is on the very bottom of the first post.  Make sure you are logged in.  Its a .zip file.

I cant wait to try this.  My neighbor GAVE me her 4,1 yesterday for FREE because she bought a brand new one and I have already ordered a T7600 and 4GB RAM.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: gmak on February 07, 2012, 11:17:44 PM
Hi,
    thank you for this tool.  I had recently upgraded my intel iMac early 2006 to t7600 2.33 intel core 2 duo when I found this thread.
I installed iMac5,1 and put in a 2 gb in place of one of my 1 gb and now have 3 gb operation.
Reading the tip from Netkas (thank you) ref chameleon and board-id and your post about booting in 64 bit
http://forum.netkas.org/index.php/topic,1123.msg6858.html#msg6858. Booting the 64-bit kernel on the 2006/2007 Mac Pro

I managed to boot via chameleon in safe mode (other modes stopping before login) with a supported id and download and install lion (via appstore). Edited the the support id list and booting normally into my new install of lion. Excellent thanks again

In the middle of all this I did manage to boot via chameleon in 64 bit mode if I removed all the
ATI* kexts from the extension folder and clear the cache no qe and 1024 x 768 res only.

Didn't understand why I couldn't boot normally into lion via chameleon tried various settings and versions obviously something to do with the x1600 graphics, but you would think I should have been able to boot 32 bit with installed kexts. Will keep having a go for a bit longer.
Anyhow thanks for a great thread
Grey

 


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Dopeyman06 on February 21, 2012, 10:11:45 AM
Some people have installed T7200 and others have installed T7600 CPU's....

What's the highest(?) cpu that an old 4,1 core duo can take?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: slite on March 09, 2012, 04:07:57 PM
Some people have installed T7200 and others have installed T7600 CPU's....

What's the highest(?) cpu that an old 4,1 core duo can take?


The highest CPU that 4,1 can take is a T7600.  The chip can not go higher than 667Mhz because of the limitations of the motherboard.  The T7600 is the fastest CPU with 667Mhz.  The T7400 is cheaper, and negligibly slower, but its power consumption makes it run hotter.

I went with the T7600.  Works great.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: slite on March 09, 2012, 05:18:56 PM
I'm hoping for some help.

I can not run the utility.  It keeps crashing.  Here is a dump of the error message:

Process:         iMac41-iMac51 Firmware Tool [350]
Path:            /Users/xxxxxx/Downloads/iMac41-iMac51 Firmware Tool 3.app/Contents/MacOS/iMac41-iMac51 Firmware Tool
Identifier:      com.apple.ASApplication
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  launchd [104]

Interval Since Last Report:          1601 sec
Crashes Since Last Report:           4
Per-App Interval Since Last Report:  0 sec
Per-App Crashes Since Last Report:   4

Date/Time:       2012-03-09 11:11:09.895 -0500
OS Version:      Mac OS X 10.5.8 (9L31a)
Report Version:  6
Anonymous UUID:  40042B89-92FE-4B11-AFFA-71560438157C

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  unknown required load command 0x80000022



Someone please help.  Already upgraded to a T7600 and now i'm sitting here with all the RAM I cant use!

___________________

UPDATE:  Ive done some investigation.  This tool was written using OSX 10.6 and it seems that the libraries aren't compatible with OSX 10.5.8.  Does anyone know how to get around this?  thanks


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Dopeyman06 on March 09, 2012, 09:46:11 PM
I'm hoping for some help.

I can not run the utility.  It keeps crashing.  Here is a dump of the error message:

Process:         iMac41-iMac51 Firmware Tool [350]
Path:            /Users/xxxxxx/Downloads/iMac41-iMac51 Firmware Tool 3.app/Contents/MacOS/iMac41-iMac51 Firmware Tool
Identifier:      com.apple.ASApplication
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  launchd [104]

Interval Since Last Report:          1601 sec
Crashes Since Last Report:           4
Per-App Interval Since Last Report:  0 sec
Per-App Crashes Since Last Report:   4

Date/Time:       2012-03-09 11:11:09.895 -0500
OS Version:      Mac OS X 10.5.8 (9L31a)
Report Version:  6
Anonymous UUID:  40042B89-92FE-4B11-AFFA-71560438157C

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  unknown required load command 0x80000022



Someone please help.  Already upgraded to a T7600 and now i'm sitting here with all the RAM I cant use!

___________________

UPDATE:  Ive done some investigation.  This tool was written using OSX 10.6 and it seems that the libraries aren't compatible with OSX 10.5.8.  Does anyone know how to get around this?  thanks

Install 10.6


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: slite on March 09, 2012, 11:14:24 PM
Of course that is the obvious answer.  I was looking for something without having to do that.

---------------

UPDATE:  I upgraded to 10.6.x and the utility worked perfectly.  Currently rocking a T7600 with 4MB RAM.  Interested to know how people with similar setup think how Lion runs.  Is it worth upgrading or should I stay with Snow Leopard?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: colingmo on March 28, 2012, 04:09:51 PM
Thanks for the firmware tool, Added a t7400 (bought on eBay), bit of a pain to fit the cpu as you have to take most of the system apart but lots of how-to's on the web so don't be daunted. Updated my iMac (early 2006) to iMac5,1 and added more memory to bring the system up to 3Gb, system much more responsive now under Snow Leopard. While I was at it updated the hard drive to 1.5tB (WD WD15EADS green), [remember to re-glue the temp sensor back on the drive].  Installed Lion via macbook firewire connection with the iMac in target mode, all OK, before reboot removed /System/Library/CoreServices/PlatformSupport.plist and boot. Great, my old iMac has a new lease of life. Keep up the good work and thanks again guys :).


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sonnoio on April 03, 2012, 12:22:07 PM
Thank you very much for this post. I would like very much to use your tool at home (I have 2 early 2006 4,1) but could not find a thread to their location.
sonnoio


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: gixxer1300r on April 06, 2012, 03:50:06 PM
Just wanted to say thanks I have a iMac4,1 and used your firmware on it, in "About This Mac" it now shows as a iMac5,1 and I have since installed a T7200 (C2D@2.0 w/4mb L2) and two matching 2Gb DDR SODIMMs. The memory and CPU show up correctly. This Mac was heading for the closet because I bought it used and it seems two of the fans were clogged up and the CPU got so hot that the piping to the heat sink turned gold and the CPU was damaged and the computer would often crash even after cleaning the fans. I don't have a lot of money and can't afford a newer iMac so buying a $30.00 cpu from eBay, some laptop memory I had laying around and your firmware gave this old Mac a new lease on life and me a chance to keep running a legit mac with legit software (SL). I don't really care about Lion as SL does everything I need crash free an quickly.

One Question: The true iMac5,1 will take 4Gb of memory but according to Apple it will only use 3Gb so the only advantage of running a matched pair of 2Gb chips is running 3Gb of data in true double data mode. Is this or can this be fixed by firmware?

I bought this iMac used at a auction for about $250.00 and added $30.00 in parts. Not bad for a C2D 2,0 with 4 Gb ram


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: bergfex on April 13, 2012, 02:34:36 PM
Thanks for the great Tool.

With an upgrade to 3gb RAM and 256gb SSD i have a "brand new imac 5.1". Now it makes fun to work with it. Before i used with increased regularity the Mac Book from my Girl Friend.



Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sharky69 on April 30, 2012, 06:38:40 PM
Thanks for the great tool. Being able to upgrade to 3GB of RAM on an old 4,1 was more than welcome and it really makes a difference in day to day use.

I had given up hope on the memory issue, therefore it was a great surprise to stumble upon this thread. The firmware tool works flawlessly too!

( Mac OS X v10.6.8 )


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on May 01, 2012, 02:48:30 AM
!!!BEWARE!!!

1- Once firmware upgraded you will be not enable to run all tests on the Apple Service Diagnostic 3s108, like juste the 1/3 of the test

2- The ambient light sensor on my iMac 20" early 2006 was not properly detected by the computer with the 5.1 firmware

3- Various graphical glitches could appear and disappear when working with the upgraded computer. On Lion, my computer was unstable and crash because of graphical issues

4- Ramdom crashes could occur.

If you have those issue, redo the flashing utility to the 4.1 firmware and upgrade your computer to more recent if could afford it.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: nick561 on May 05, 2012, 06:22:09 AM
Thanks a lot slite for this information.............


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: re-book on May 26, 2012, 09:05:58 AM
Hi and once again,

is there a way to overcome the 2 gig limit on a 17" C2D iMac 5.2 by modifying the scripts in this tool?
Form tech specs it should be nearly the same like the 5.1 but has chipset graphic only.

Thanx and best,

re-book


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on May 28, 2012, 11:18:59 PM
iMac 5.2 is have not the same logicboard/motherboard than the 5.1 17". The HW resemble much more like a Mac mini late 2006 with a LCD or like a Macbook.  :-\


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: grebarker on June 14, 2012, 01:14:33 PM
Just swapped 7600 into early 2006 MA200LL 20" iMac. (Yes, it is a wee bit of a challenge, this one is not exactly the same
as the guide - http://www.maclife.com/article/upgrade_your_imac_core_2_duo_processor - and sure enough 2 of the 4 pin
connectors gave me grief)! But I managed it.
About This Mac now shows the 2.33 GHz Intel Core 2 Duo. Downloaded the 4,1 to 5,1  Tool and attempted to run it.

Got this "The program has encountered an error. 5570" response. Can't find an explanation for that error code, so
I am asking what I need to know so I can upgrade the Boot ROM version IM41.0055.B08 to the 5,1?

If I can do that does that mean I can swap the 2 1GB RAM chips for 2 2GB RAM chips and will the iMac run 64 bit?

I'm guessing I'll be able to install another 2 TB 7200 rpm HD and partition it into three drives so I'll be able to
continue to run Snow Leopard, Lion, and shortly Mountain Lion, plus, using Parallels run XP pro and Windows 7.
Or is there, as I fear, more flaws in that vision than I want to learn about?

                                                   Thanks Greg


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: igarcia0264 on June 15, 2012, 05:08:50 AM
I too have the "The program has encountered an error. 5570" issue.
Not sure if maybe we should have the original CPU in during install maybe?
Or maybe apple moved something and this program cannot find the needed files it is supposed to download?

Not really sure does anyone know?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: grebarker on June 16, 2012, 03:27:51 AM
Still stuck with error:5570. Attempted to remove /System/Library/CoreServices/PlatformSupport.plist, but
could not locate it! Is it a hidden file? Running 10.6.8.  
  Model Identifier:   iMac4,1
  Processor Name:   Intel Core 2 Duo
  Processor Speed:   2.33 GHz
  Number Of Processors:   1
  Total Number Of Cores:   2
  L2 Cache:   4 MB
  Memory:   2 GB
  Bus Speed:   667 MHz
  Boot ROM Version:   IM41.0055.B08
  SMC Version (system):   1.1f5

  If anyone has a possible explanation for " error:5570 " pleases let us know?

  If anyone has a clue why /System/Library/CoreServices/PlatformSupport.plist is not there,
or is, but is just hidden, please let me know?

  If /System/Library/CoreServices/PlatformSupport.plist is missing should I reinstall Snow
Leopard?

  Lion thumb drive says "This version of Mac OS X 10.7 cannot be installed on this computer."


                                                                                       Thanks, Greg


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sharky69 on June 17, 2012, 06:18:57 AM
The only minor issue is that sleep mode does not work properly for me, after the firmware upgrade to iMac5,1. What happens is that I put my iMac in sleep mode and it will sometimes get out of sleep mode on its own, after a while.

It doesn’t happen always, but it happens often enough.

( Mac OS X v10.6.8 )


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: xi1inx on July 19, 2012, 04:31:52 AM
This mode doesn't change the Logicboard model number. So the Lion indentify the 5,1 flashed iMac as a 4,1, it's normal. You must add your iMac 4,1 logic board number into the platformsupport.plist of Lion to be able to install it.



Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Blackmac on August 27, 2012, 03:00:44 AM
This works flawlessly  :D

Now the only thing to do it's upgrade this EFI to a 64 bit! That could be magical! ;)

THANKS!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Joe17150 on September 09, 2012, 01:32:52 PM
Hi everyone.I am new to the site.I found my way here trying to upgrade my iMac early 2006 17'.After many hours of searching i managed to upgrade everything.The cpu i went cheap and just put a core 2 duo t5600.Then i used the modded boot efi found on the net,Step 2 was install Mountain lion gm.When it booted i had several video errors,so i went on the hunt to solve my radeon x1600 probe and sure enough their were modded files for that.Then the 64 bit issues.So i searched about that and their it was.I followed the steps and all was good.Last i did the firmware upgrade.I also used 2 or 3 other programs i found to help me along the way,such as ShowAllFiles another one off the app site to help with flash.Now i have an Early 2006 iMac 17' About this says core 2 duo mac 5.1 running 4gb ram.After 3 days of running lion 10.8.1 everything seems to work great.the reports show me 64bit operation.I don't know if i am allowed to post the files i used to do my upgrades which are still on my desktop but with a bit of searching you can find them easy,Best way is to search for what you want not the whole upgrade Example; Modded boot.efi early 2006 iMac or radeon x1600 lion drivers.These are just search ways i found all the files i needed to complete a great upgrade to a older iMac.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: SummerSoFar on September 09, 2012, 06:34:32 PM
Hey Joe-

That is great news. I have been following the (slow) progress in getting older 64bit unsupported Macs to run on ML, and everything I have read says that iMacs 4,1 and 5,1 with x1600 graphics lack QE and OpenGL 4 support, which makes many apps unstable, extremely slow, or simply not executable in ML.

http://forums.macrumors.com/showthread.php?t=1325709

Can you confirm that your setup allows LaunchPad, YouTube, and other QE-heavy applications to work fully and properly?

If so, it would be great contribution to the community if you would please provide the sources to your files, and also provide the detailed install instructions either here or to the macrumors forum linked above.



Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Joe17150 on September 09, 2012, 09:13:47 PM
I have had some issues with some things. Youtube was a problem until i installed Click to flash found on the safari extensions link,now youtube works great.I am still testing os x 10.8.1 and trying to work out the few remaining bugs.Anything i find over the next few days i will post no prob.If theirs a way- I have the will lol and as it stands i am not afraid to try anything.I can reinstall without a prob so i don't care if i mess something up.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: drccw on October 06, 2012, 05:23:55 AM
Well my HD died so I opened up my early 2006 iMac...
and did lots of work....

NEw 2TB HD
New airport Extreme module (with -N support)
New T7600.....

now I'm rejuvenating it... gonna update the EGI and go to 4 GB ram...

though from what I understand onlt 3 GBs are really used?

drccw


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: cirommp on November 05, 2012, 05:07:46 PM
Hi, I have an iMac 4.1 upgraded to iMac 5.1 with a T7500 processor (2,16), 4Gb, OSX Lion and a new SSD (Crucial v4 256Gb).
Everything is ok if I run Lion from a USB HD, but I run the same OS with the SSD (I cloned the content with Super Duper), I have freezes and beach balls all the time. Of course I have installed the trim enabler and all the performance SDD issues (hibernation, sleep, noatime...).
I don't know why I have this problem.
Maybe all this tweaks are a bad cocktail...
Anyone have a similar configuration? How it works?
Thanks!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: aggeren on December 09, 2012, 11:41:52 AM
Have an imac5,1 which the lion installer wouldn't recognize as "valid". So i gathered that something were wrong with my machines imac5,1 system profiler and therefore I decided to downgrade imac5,1->imac4,1 with this tool and afterwards i would upgrade it again to get the right profile for lion-installation.

But after the imac5,1->imac4,1 firmware change, my machine won't boot, it only shows a black screen.

Any way of undoing this? Run the firmware script from a bootable USB-disk? Or is the only way to get the mac bootable again, to change the CPU-model supported by the imac4,1?

Regards, Thomas


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Loki on January 13, 2013, 12:58:57 AM
Thank you so much MacEfiRom :)

I had got Core Duo 2.0 Ghz imac 4.1(Early 2006). After read your post, decided to upgrade my iMac. Managed to find T7400 Core 2 Duo CPU & installed it with the help of my lovely wife. Then used your flash efi & worked like a charm. Now I've got 64bit processor, 4GB ram. But What I dont understand is System says I got 4GB ram. After Effects CS5.5 Trial shows 4GB totalram. But only in activity monitor I see 3GB available ram. Which is true?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: zioweb on February 02, 2013, 01:37:43 AM
thanks to the author for this script.
I've an old iMac4,1 just updated in hard disk and cpu (T7200) and now also with 3gb RAM.
But, what another user says it's true: after update the ambient light sensor no longer works.

Any idea?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Techmac on February 11, 2013, 08:30:21 AM
Last week I have upgrade my iMac 20" (A1174) from T2500 to T7400, very fine. I have installed Bluestacks with Whatsapp and run smoothly.

Thank for the script writer that I can upgrade iMac4.1 to 5.1.

Thank you very much.

In addition, I found the light sensor is normal without any problem.






Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: alfagard69 on February 14, 2013, 01:00:16 AM
Thanks for sharing the awesome Firmware tool.
I bumped my old iMac 4,1 to a 5,1 with it.
This allowed me to install 4GB of RAM, T7600 processor and Lion (via Target mode.)
I did have the HD fan run at full speed after this.
Looked at HDD Fan Control,  but found a great shareware fan controller:  SSD Fan Control.  
You can find it here: http://exirion.net/ssdfanctrl/
Hope this helps.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: zioweb on February 21, 2013, 09:41:42 PM
Last week I have upgrade my iMac 20" (A1174) from T2500 to T7400, very fine. I have installed Bluestacks with Whatsapp and run smoothly.

Thank for the script writer that I can upgrade iMac4.1 to 5.1.

Thank you very much.

In addition, I found the light sensor is normal without any problem.






is a great news: did you upgraded the firmware before the cpu change, or later? on Lion or Leopard?

you're sure that under System Preferences - Display - you'll see the option to set automatically brightness?

I've also tried to restore the firmware at 4,1 version and the ambient light sensor doesn't work anymore.
there is a way to reset the SMC, but a serious way, not the "unplug and replug power"?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: collieman on March 08, 2013, 11:48:03 AM
Thank you so much for this firmware tool that YOU made ;D. Worked first time on a Imac 17" 2006 lol now i have it on 5.1 firmware. Right ebay for cpu upgrade lol

Thanks man 8) 8) 8) 8) 8) 8)


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: ohmahlawdletmeregister07 on March 10, 2013, 11:18:38 PM
Oh man, this looks fucking marvelous!
I'm now looking for parts to upgrade my iMac.

One question though: In what order should you do this?

Install CPU, SSD and memory first and firmware last?

Install Firmware first and then replace CPU, put in SSD and memory?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: analogcd on May 13, 2013, 01:04:13 AM
Thank you sir. This appears to be just what I need to make my C2D processor upgrade complete. I will post results to confirm proper function. Other upgrade worth mentioning in same 4,1 iMac was an SSD in place of optical drive. The MCE brand adapter works, but for those contemplating same ODD removal, I suggest a different brand. If anyone is interested in the nuances of MCE adapter please chime in and I will respond accordingly.
Aloha,
analogcd


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: n3m3$1$one on May 31, 2013, 04:07:19 PM
We have tried an iMac 4,1 with both Core Duo and Core 2 Duo processors but consistently get the 5570 error and can't get past it.  Has anyone any suggestions or advice?
Alan.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Blackmac on June 01, 2013, 04:58:17 PM
Thank you so much MacEfiRom :)

I had got Core Duo 2.0 Ghz imac 4.1(Early 2006). After read your post, decided to upgrade my iMac. Managed to find T7400 Core 2 Duo CPU & installed it with the help of my lovely wife. Then used your flash efi & worked like a charm. Now I've got 64bit processor, 4GB ram. But What I dont understand is System says I got 4GB ram. After Effects CS5.5 Trial shows 4GB totalram. But only in activity monitor I see 3GB available ram. Which is true?

I have the same question...

AE shows 4 GB installed (I have 4 GB) but Avtivity Monitor shows 3GB!

 ??? ??? ???


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: blacksheep on June 01, 2013, 06:35:43 PM
Activity Monitor shows addressable memory and it's always correct. It's chipset limitation AFAIK.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: calebjcook on June 10, 2013, 11:19:59 AM
i was given an iMac 4,1 and used this firmware tool to allow the installation of more RAM.

a big thanks to the OP and those who wrote the firmware tool. it worked exactly as advertised.

great work :D


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sekonder on June 19, 2013, 03:00:13 PM
Thank you so much for this amazing script. I'm about to do this, and i'm not sure, how i should start. Do i have to change the cpu first or run the script? Could anyone tell me?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 20, 2013, 06:15:16 AM
I just implanted my new core 2 duo processor in my imac 4,1 and it's a great deal faster now, but your upgrade tool says "this program requires internet access please connect your imac to the internet and try again" then closes. I'm on the internet posting this right now so I don't understand the issue?!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sekonder on June 20, 2013, 01:15:46 PM
So, I didn't know that the 4,1 motherboard supports Core2Duo processor. That means, that i can upgrade the cpu first.

@Fishing4feeling

Have you changed just the processor or hdd and ram too? How faster is your imac now?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 20, 2013, 10:50:41 PM
I just changed the CPU, ordered a T7600 merom cpu on ebay for 90$. I will upgrade the ram to 2x2GB ddr2 667 (or 800) 200pin ram as soon as I get this firmware applied


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sekonder on June 21, 2013, 06:40:48 AM
Yes, that's what i want to do. The uncle ebay gave me a t7400 for 25€.

I hope, you're gonna be done with applying the script. Did you try it on Snow Leopard or on Leopard? Somebody on this thread said, the script was coded on Snow Leopard, that's why it could gave an error on Leopard or something like that.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 21, 2013, 03:57:49 PM
Okay after the tedious job of transplanting the new merom cpu, I applied the firmware finally and everything is working. The first time I tried executing the firmware it said I couldn't because I didn't have an internet connection, so I unplugged my LAN connection (which has internet) and activated wireless instead. Mysteriously it worked, then I had a new error while it was extracting (error 5570 or something) so I just kept trying until finally it went through and rebooted. I held the power down to start, and it made a noise that sounded like the fire drill alarm, and it went through no problems. When I got in the first time everything was working except the wireless, so I rebooted again, and it was back. Now everything works says imac 5,1 with core2 duo, and I'm going to go ahead with the SSD / ram upgrade which is a little easier than the last with the CPU hidden away in the back underneath everything. I have managed to connect everything back except the camera which I will have to go back in and fix when I upgrade to SSD.

The wiring is very difficult when putting everything back together, take lots of pictures!  Any 667mhz merom cpu on ebay should work. The speed difference with the 64bit core2 duo is immediately noticeable, and I haven't even reinstalled MacOS to be 64bit or added 4GB ram / SSD. 

Have fun!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sekonder on June 23, 2013, 05:38:48 PM
So, i've done with the firmware upgrade. My iMac recognises 4 Gigs of ram now and he shows, that he an iMac 5,1 is. Now i'm gonna upgrade the cpu with t7400.

The important information: The reason of the error message that the script should have an internet connection, is because of the firewall. I deactivated all of the firewalls permanently on my 6 computers in my house, because i've a firewall device, Netgear Prosafe FVS338. I saw minimum 5 times this error message, so that i couldn't upgrade the system. I've disabled the firewall, than it worked!



Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 26, 2013, 01:36:46 AM
Has anyone noticed how much hotter the imac runs after the cpu upgrade?! The entire left side of my imac is super hot to the touch. Did I forget a screw somewhere or something??  I havn't even installed mountain lion yet


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: sekonder on June 26, 2013, 07:04:31 AM
Actually it should be cooler after the upgrade, because of the cpu. Core 2 Duo cpu needs less power so that it keeps cool. Check out inside of the case.

I think, you've applied the thermal paste, or not?  ???


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 26, 2013, 03:02:08 PM
yes I applied the thermal paste (not too much / not too little) maybe I'll install some temp monitoring software.. don't want it to meltdown on me.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: fishing4feeling on June 28, 2013, 08:35:13 PM
So maybe i could have screwed the heatsink on to the cpu a little tighter but the CPU temp is hovering between 65-72 degrees so it's not too badly in the danger zone.

I just reinstalled Snow Leopard after upgrading my cpu to a 64bit capable Core2 duo hoping to get MacOS installed in 64bit but when I type uname -a from the prompt it still says i386?  Do I have to change the cpu microcode in the bios or something like this? What am I doing wrong??? It should be arch=x86_64 I believe. 

bash-3.2# uname -a
Darwin Jesse-Staceys-iMac.local 10.0.0 Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386 i386
bash-3.2#


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Apeles on July 05, 2013, 01:09:50 PM
hi, I can't upgrade my mac from 4.1 to 5.1, I turn off the mac, I keep the button for a few seconds until light flashes, but then it starts as normal without updating the system...

edit: okay It seems that you updated, at first Airport didn't work, 'Airport Card not detected', seems now repairing permissions returns to work.., I have a question, I want to run the bluestacks but seems to not work, because this happens? Thank you


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: jjgiangi on July 18, 2013, 02:46:41 PM
I have upgrade my imac with new firmware 5.1, changed cpu widht core2duo 2ghz, added 4gb ram, installed osx10.7 Lion and yeahhhhh... that's all right.
I want add a ssd unit samsung or sandisk 256gb widht sata 3 interface. It's compatible widht the imac Sata controller?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: 123jesus on July 22, 2013, 01:16:28 PM
I have an iMac 5,2 with a 1.83ghz... i need to unlock the ram limit, i was told that it can go up to 8 gig... is it possible and is there a tool for it?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Ecnerwal on July 30, 2013, 11:04:54 PM
To be clear before I dive in:

If I use the tool on a stock 4,1 I should be able to get the 3GB RAM without upgrading the processor as well?

I think some people have reported that, but it can be a bit unclear as many end up doing both. While I might end up doing both, at the moment getting more RAM capacity is more important than more processor ability, if the two are NOT linked. I appear to be in the distinct minority here - I'm running Lion (less than utterly gruntled) on a 2011 mini only because I can't downgrade it to SL, and the 4,1 imac in question has been running and will continue to run SL. As for ML, my general experience with it is to throw my hands in the air and mutter "WTF, Apple - WTF!" - starting with the fact that I had to pass a 10.4 machine through a 10.7 machine (ie, double-migrate the user - teee-dee-ous) in order to simply manage user migration - the 10.8 machine claimed there was nothing there to migrate when the 10.4 was hooked to it in firewire target mode...

Having only applied an hour or so of research to the problem since discovering the possibility of not just living with it three hours ago (repurposing machine, has been doing what it used to do fine with 1GB) - is there a clear, complete list of acceptable core2duo upgrade processors? The T7600 prices are a bit steep in my present thinking. I'm not seeing one (yet) on any of the "upgrade your iMac" sites, and I don't live and breathe Intel processors - there are WAY too many to sort through, and I generally spend hours at CPUBenchmark when trying to pick one out of a hat - a process that would probably be considerably simplified with a list of what could work, followed by looking at how high (or not there) they are at the 'bay, followed by sifting what remains.

I've seen T7600, T7500 (but intel says that is 800MHz FSB?), T7400 (more TDP? Posts here say it runs hotter, but intel lists them both at 34W) T7200 T5600 mentioned in this thread.
(with considerably more than an hour now invested as I edit this into something that might be of use, eventually)
Not mentioned here but apparently also "667MHz FSB merom Core 2 Duo" : T5750 T5550 T5500 T5450 T5250 L7400 L7200

What socket are we actually looking for? PPGA478 or PBGA479 (as listed on Intel's site)? Neither of which appears to be the "socket P" or "socket M" I see on ebay parts? http://en.wikipedia.org/wiki/Socket_M (http://en.wikipedia.org/wiki/Socket_M) appears to suggest it would be Socket M? I just love it when there are many ways to buy the wrong part that seems right at first glance...especially when some vendors are claiming multiple socket types (listed as incompatible in the Wikipedia article) for the same chip.

Here's a link to some discussion and a link to better teardown instructions than the MacLife version posted earlier...
http://www.ifixit.com/Answers/View/51699/Core+Duo+CPU+upgrade+to+Core+2+Duo+CPU (http://www.ifixit.com/Answers/View/51699/Core+Duo+CPU+upgrade+to+Core+2+Duo+CPU)

Here is another: http://macstack.net/viewtopic.php?f=8&t=10746 (http://macstack.net/viewtopic.php?f=8&t=10746) which provides a confirmation of "Socket M" and a shortlist of SocketM Core 2 Duo processors: T5200, T5300, T5500, T5600, T7200, T7400, and T7600


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: NothingMuchHereToSay on July 31, 2013, 07:26:13 AM
Does this work on an iMac 4,2?

If so, is there also a way to get Linux to run the firmware update?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Ecnerwal on August 07, 2013, 07:54:17 PM
Notes: My  4,1 Core Duo (OS 10.6.8) would not boot with 4GB RAM installed (pre-ROM upgrade.)

Would boot with 2GB in either slot. I did not try it with 3GB installed before upgrading ROM.

Error 5570 - I got it, I disabled Airport and plugged in an ethernet cable, that seemed to solve that.

Still, I had to try many times before it would install. I'd hold down the power button and get the blinky-power-light, or hold it through the blinky-power-light to the long tone, and both ways it would just boot normally without going to a ROM upgrade progress bar. Sometimes (I have disks showing on the desktop in Finder Preferences) I saw it create two RAM disks. One was empty. The time it actually worked, it had only made one RAM disk. But I think it had failed to upgrade with only one RAM disk at an earlier point. Eventually, persistence and/or repetition got it there.

Without upgrading processor (I have not and don't know if I ever will) activity monitor RAM is reported precisely at 3.00 GB (I think some claimed 3.33 - don't know if you would or would not get that with a processor upgrade.) Given what this machine will be doing, I removed 1 2GB stick and replaced it with a 1GB stick. Any (probably very slight) improvement in access is outweighed by completely wasting a 2GB stick capacity wise, unless memory prices go back down again.

Now to see if there's something equivalent (just for the RAM increase) for a MacBook 1,1


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: risc303 on August 12, 2013, 12:31:14 PM
Hi,
     I know this is an old post, but is there a similar way to update the firmware of the iMac 9,1 to take more than 8GB of memory?
Thanks!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: m33x on October 04, 2013, 07:09:34 PM
Thank you very much! Works like a charm!

Now, after I upgraded my iMac 4,1 from Core Duo T2500 Yonah to a Core 2 Duo T7200 Merom and installed the Firmware Upgrade it was possible for me to install 10.8.4 Mountain Lion and buy 4GB of DDR2-SO-DIMM 667MHz RAM at Amazon.

http://forums.macrumors.com/showthread.php?t=1325709

Thank you very much.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: wils488 on January 05, 2014, 06:16:35 AM
Where do I download this tool? "iMac4,1 and iMac5,1 Firmware Tool Released"
I don't see it posted anywhere on this forum.
A little help would be appreciated.
Thank You.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: magicbello on January 09, 2014, 02:15:24 AM
Where do I download this tool? "iMac4,1 and iMac5,1 Firmware Tool Released"
I don't see it posted anywhere on this forum.
A little help would be appreciated.
Thank You.

Just register and login  ;D


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: nowy889 on January 31, 2014, 07:43:06 AM
Hi. I've got a solution if you can't install lion after upgrade of firmware.
The best and fastest way to install lion is to install it or open a clean install on VMware workstation.
Than you can make a back up by   Carbon copy cloner. Link below.
http://www.bombich.com/download.html (http://www.bombich.com/download.html)
After you make a backup , simply move it to snow leopard and clon it to clean partition.
And that's It.

It should work 8)

Just renember to copy "All Files" , don't make the normal backup.

Another thing is that imac 4.1 upgraded to 5.1 cam run with addressing full 4gb of ram.

In both snow leopard and lion, you have to run it with 64bit kernel.

Here is a solution.

http://support.apple.com/kb/ht3773 (http://support.apple.com/kb/ht3773)

Another way to install lion on unsuported mac:
http://jeremyjbowman.wordpress.com/2011/07/29/install-mac-osx-10-7-lion-on-unsupported-processors/


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: matacao on February 05, 2014, 05:07:40 PM
Thank you for this tool !


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: busker on February 08, 2014, 01:36:34 PM
Just like to say massive thanks for this...I didnt know much about imacs when I bought a second hand one, and was a bit cheesed off when I found out the memory limitations of 41. Just done the flash and its worked perfectly...gonna stick my extra memory in now
Many thanks again!!!


Title: Re: iMac4,1 and iMac5,1 Firmware - LION install
Post by: cborjon on February 13, 2014, 07:05:47 PM
As for installing OS X 10.7 Lion after you do the firmware upgrade.

Here is the procedure I used:

Step 1: Create a new partition for the installer.
 
I used an 8Gb USB flash drive.

Using Disk Utility, create a new partition to install Lion from
• Name: LionInstaller
• Size: 7.0 GB (or bigger)
• Format: Mac OS X Extended
• Partitions: Single partition - GUID Partition Map

Step 2: Mount the Lion installer image.
The installer image is inside the 'Install Mac OS X Lion' app.  Right-Click on the the app and select "Show Package Contents".   In the Contents:SharedSupport folder is the InstallESD.dmg image file.  Double-Click on the InstallESD.dmg image, and it will mount as 'Mac OS X Install ESD'.

Step 3: Mount the Base System image.
The Lion installer image contains some hidden files, to get to them you'll need to use the Terminal, from the terminal prompt you can give the following command ($ is the shell prompt):
$ defaults write com.apple.Finder AppleShowAllFiles YES
After the command is executed, RELAUNCH the Finder (Choose Force Quit from the Apple menu; select Force Quit...; select Finder and click Relaunch)

From the mounted 'Mac OS X Install ESD' image (it looks like a disk on your desktop).  Find the the hidden file BaseSystem.dmg.  This is the system that will be used to boot the installer.  Double-click on BaseSystem.dmg and it will mount as 'Mac OS X Base System'. 

Step 4: Copy the base system.
The entire contents of the base system need to be copied to your 'LionInstaller' partition. You will use the 'Restore' feature in Disk Utility to do the copy.
If it is not already there, drag 'Mac OS X Base System' mounted image to the left-hand sidebar in the Disk Utility.  Select it from the sidebar.  Click on the Restore tab-button at the center-top of the Disk Utility window.  If you selected 'Mac OS X Base System' it should be listed as the Source. For Destination, from the upper portion of Disk Utility sidebar, drag the 'LionInstaller' partition you created in step 1 to the Destination field. 

Once the Source and Destination are set, click the actual Restore button (say yes to the "Erase destination" prompt).  Disk Utility will do a block copy that will take a few minutes.  (Once it is finished, you can eject the BaseSystem image, it is no longer needed.) You will notice that your LionInstaller partition is now named 'Mac OS X Base System'. Rename it back to 'LionInstaller'.

Step 5: Copy the installation Packages.
Before the packages can be copied from the Lion installer image, there's a symbolic link in your 'LionInstaller' partition that needs to be deleted.
$ sudo rm /Volumes/LionInstaller/System/Installation/Packages


$ sudo cp -R /Volumes/Mac\ OS\ X\ Install ESD/Packages /Volumes/LionInstaller/System/Installation/Packages
The copy (cp) command will take a few minutes since it's copying 3.2Gb of data to your LionInstaller partition.


Step 6: Delete the PlatformSupport.plist file
This needs to be done to allow the 'LionInstaller' partition to boot properly
$ sudo rm /Volumes/LionInstaller/System/Library/CoreServices/com.apple.recovery.boot/PlatformSupport.plist

Step 7: Copy the OSInstall.mpkg to your 'LionInstaller' partition.
Unzip the attached file (see note at end of Step 11) and then replace the OSInstall.mpkg in "/Volumes/LionInstaller/System/Installation/Packages".  You can simply drag and drop the file to the System:Installation:Packages folder of your 'LionInstaller' partition.

Step 8: Install Lion
Reboot your machine and hold down the 'option' key and choose to boot from 'LionInstaller' (it might be called "Mac OS X Base System" depending on if you mounted and then remounted your partition or not).  When system comes up, it should automatically launch the Lion Installer.  Go ahead and go through the Install.  This installation is an UPGRADE, and it will install Lion over Snow Leopard thus saving all your settings, applications, data, etc.  [However, be safe and make sure you have a backup of your important data - Murphy's Law and all!!!!!].

Step 9: After the installer has completed reboot your machine back into the 'LionInstaller'
At the end of the installation your Mac will reboot and your machine will refuse to boot into the Lion.  Don't worry you just need to delete one file to get it to finish the install and get it to boot into Lion.  When the installation fails, hold down the power button to do a hard re-boot.   Once again hold down 'option' and choose to boot from 'LionInstaller'.  This time instead of starting the install process choose to run Terminal from the Utilities menu.

From terminal you need to delete the following file: "/Volumes/'name of your new lion partition'/System/Library/CoreServices/PlatformSupport.plist".  For example I installed Lion to a drive named Macintosh HD, thus I issued the following command:
$ sudo rm /Volumes/Macintosh\ HD/System/Library/CoreServices/PlatformSupport.plist

Step 11: Reboot your machine into Lion  :)

Giving credit where it is due... 
Most of the above comes from post #8 on the follow page:
 http://www.insanelymac.com/forum/topic/249877-how-to-install-lion-on-any-coreduo-mac-upgraded-to-a-core2duo/
I clarified some the explanations as well as fixed the quotes in the Unix commands so you could just cut and paste the commands to Terminal.
[Edit]: You will have to visit the above credited site to get the file.  At 544kb it was too big to upload here.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Oneflewoverthecoocoosnest on February 23, 2014, 04:11:43 PM
I was asked by a couple of fellow forum members to write a firmware tool for the iMac4,1 and iMac5,1. This model was the first iMac introduced with an Intel processor in 2006, and they later updated the platform with Core 2 Duo CPUs. The iMac4,1 came with the Core Duo processor, which was limited to 2GB of RAM, and was only a 32 bit CPU. The iMac5,1 came with a Core 2 Duo CPU, and can take 4GB of RAM, and is a 64 bit platform, even though the kernel can only boot in 32 bit due to 32 bit EFI. A lot of people have upgraded their CPUs, but are still stuck with the 2GB RAM limit and have to hack Lion to get it to run. This firmware upgrade removes the 2GB RAM limit, properly identifies the Core 2 Duo CPUs, and Lion will install and run just fine. The core file set has been tested by a forum member (Thanks Martin), and while I don't have an actual iMac to test on, the files created for the firmware upgrade perfectly match the core file set that has already been tested. As usual, you can upgrade or downgrade at will. If you have a CPU in an iMac5,1 that isn't supported in the iMac4,1, the system will not boot after the update until a compatible CPU is installed. The program checks the iMac model and will only install the iMac5,1 firmware on an iMac4,1, or the iMac4,1 firmware on an iMac5,1, whichever is appropriate. If you have an iMac5,1 the program will warn you about downgrading, but will still allow the firmware update. The download does not contain any firmware updater files or image files. The program creates a small RAM disk, downloads the needed files, copies all of the scripts to the RAM disk, and then runs the scripts. Everything is left on the RAM disk for you to look at and study, if needed.

There have also been requests for a MacMini1,1 and MacMini2,1 firmware tool, and although there doesn't appear to be a MacMini2,1 firmware image in any of the Apple provided downloads, I'm looking into the feasibility of extracting an image using a tool in the rEFIt package, so stay tuned.

I hope you enjoy the benefits of extending the value of your iMac4,1, or being able to change your system back and forth for development purposes.

Does the OSX version matter to apply this firmware upgrade?  What is the procedure to apply it as double clicking it doesn't work.  I'm a little lost on how to apply.  Can anyone assist?  I just upgraded to a new Samsung SSD and new 2.33Ghz CPU, reloaded the original operating system, let it download and install all of its updates to Tiger 10.4.11.

Figured it out.  I had to launch the tool in Snow Leopard as Tiger wouldn't do it.  iMac now showing 5,1 with 4 gigs ram. New SSD, CPU and Optical drive installed.  First time to tear one apart.  For the inexperienced at this DO NOT believe the "it can be done in a hour BS", ain't gonna happen in that time frame!  LOL


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: cborjon on February 28, 2014, 11:44:34 PM
Wholeheartedly agree that this will take more than an hour.  Even using iFixit's tear down guide, it is quite a process to take apart one of these old iMac's.  First the clips holding the case together are a serious pain to get to (if you have never done it before).  Then there is the whole issue of the dual heat sink (covers both the CPU and the graphics chip...if you have one of these, you are going to need a second set of hands when reattaching the heat sink w/thermal paste). 

It is definitely a doable upgrade for a newbie, but you will need some time (a free afternoon at least) and some patience.
However, the application of the Firmware upgrade is breeze (make sure you have upgraded to Snow Leopard first). 
Thanks again MacEFIRom for providing the Firmware Tool!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: faded_memories on March 29, 2014, 08:29:28 PM
Can a 4,1 iMac be upgraded to Mavericks?

At the moment I am running 4,1 with a 2Ghz processor.  (I can't remember which chip I bought.)
Did not use the firmware update, didn't increase the RAM.

I had a friend install Lion for me with some variant of the target disk firewire method.

Darn thing has been dragging and then it occurred to me I put in a newer OS but never more RAM.  Doubling the RAM to 4G is a no-brainer, just have to pick some up...

Here is where I'm confused...

Does the firmware updater allow for OS updates without further hacking? Can I upgrade from 10.7.4 to Mavericks?  I had read that some users of Lion hacked machines had bricked them when they tried additional updates...

Thanks!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: ahaus on April 14, 2014, 07:01:57 AM
Thanks for the write-up, cborjon!  Very well done.  I am on your final step and can't remove the .plist file; the Terminal in the LionInstaller seems to be for only that partition.  Any help getting to that .plist file so I can remove it and run Lion would be great. 

This is on an iMac 4,1 that was running 10.6.8 in a 5,1 config after I upgrade to a T7600.

Thanks in advance for the guidance!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: pcenforme on April 25, 2014, 11:26:36 PM
Hi everyone
i am happy found one space with really top passion of macosx.
i dont speak fine english,but with translate and my short vocabulary i understand.
In 15 days i I wish to offer you a small gift of encouragement, be little paypal is there a link?
Big thanks and espere that one days i can help users forum.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: ahaus on April 29, 2014, 03:32:52 AM
BUMP

Any help will be more than appreciated, thanks!

Thanks for the write-up, cborjon!  Very well done.  I am on your final step and can't remove the .plist file; the Terminal in the LionInstaller seems to be for only that partition.  Any help getting to that .plist file so I can remove it and run Lion would be great. 

This is on an iMac 4,1 that was running 10.6.8 in a 5,1 config after I upgrade to a T7600.

Thanks in advance for the guidance!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: narftroz on May 03, 2014, 06:42:32 PM
Great and easy tool. thanks for your hard work and effort to keep these cool old boxes alive.

However...... i have an issue that i think my be related. my Serial Number in about my mac now just shows SystemSerialNumb. doesn't seem to break anything, it is just weird. has anyone else seen this after the system patch?

Well, looks like it was NOT related. seems it was a refurb board i had gotten and there was no serial. so i got the apple set serial disk out and set it to match the one on the bottom.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: jbritterjr on September 17, 2014, 10:42:40 AM
Has anyone tried the firmware tool with an iMac5,2?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: hatecarb4 on September 19, 2014, 03:58:53 AM
Imac early 2006 with Core 2 Duo 2.16 GHz CPU, 1TB hard drive running Snow Leopard and work perfectly before firmware upgrade. Firmware upgrading to 5.1 went smoothly until progress bar full and imac restart but it appear only grey " do not enter" sign on the screen and soon become flashing question mark.

What I did wrong?  I read all the posts and found almost everybody happy with this upgrade, nobody got this problem, now my Imac look like junk please help.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: hatecarb4 on September 20, 2014, 03:55:01 AM
Don't worry, after leave it off for 24 hours now it boot into OS fine and become an IMac 5.1 as expect.

Thank you


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: curtis on October 18, 2014, 10:09:59 PM
I was asked by a couple of fellow forum members to write a firmware tool for the iMac4,1 and iMac5,1. This model was the first iMac introduced with an Intel processor in 2006, and they later updated the platform with Core 2 Duo CPUs. The iMac4,1 came with the Core Duo processor, which was limited to 2GB of RAM, and was only a 32 bit CPU. The iMac5,1 came with a Core 2 Duo CPU, and can take 4GB of RAM, and is a 64 bit platform, even though the kernel can only boot in 32 bit due to 32 bit EFI. A lot of people have upgraded their CPUs, but are still stuck with the 2GB RAM limit and have to hack Lion to get it to run. This firmware upgrade removes the 2GB RAM limit, properly identifies the Core 2 Duo CPUs, and Lion will install and run just fine. The core file set has been tested by a forum member (Thanks Martin), and while I don't have an actual iMac to test on, the files created for the firmware upgrade perfectly match the core file set that has already been tested. As usual, you can upgrade or downgrade at will. If you have a CPU in an iMac5,1 that isn't supported in the iMac4,1, the system will not boot after the update until a compatible CPU is installed. The program checks the iMac model and will only install the iMac5,1 firmware on an iMac4,1, or the iMac4,1 firmware on an iMac5,1, whichever is appropriate. If you have an iMac5,1 the program will warn you about downgrading, but will still allow the firmware update. The download does not contain any firmware updater files or image files. The program creates a small RAM disk, downloads the needed files, copies all of the scripts to the RAM disk, and then runs the scripts. Everything is left on the RAM disk for you to look at and study, if needed.

There have also been requests for a MacMini1,1 and MacMini2,1 firmware tool, and although there doesn't appear to be a MacMini2,1 firmware image in any of the Apple provided downloads, I'm looking into the feasibility of extracting an image using a tool in the rEFIt package, so stay tuned.

I hope you enjoy the benefits of extending the value of your iMac4,1, or being able to change your system back and forth for development purposes.

I have an iMac4,2 and upgraded the processor but wasn't able to get the iMac4,1 and iMac5,1 Firmware Tool working because I have iMac4,2 and not iMac4,1...

Can someone point me in the right direction to upgrade my iMac4,2 to iMac5,2?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: vfrontiers on October 22, 2014, 10:41:30 PM
I, too, am looking for a response to the iMac 5,2 compatibility...


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: 54fins on November 06, 2014, 05:05:15 AM
I too would like to do the 4,2
How would that happen?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: cborjon on November 17, 2014, 06:39:08 PM
Some people have asked about the following command in the write-up I did above.  

$ sudo rm /Volumes/Macintosh\ HD/System/Library/CoreServices/PlatformSupport.plist

A few things....
First, the $ is just the prompt on my system, yours most likely will look different.  It may not even end in a $ if you are using a different shell like bash.

Second, all the commands are there so you can just cut and paste i.e. there should be no confusion like "is there a space between sudo and rm?" (BTW there is a space there).

Third, while I said you can just cut and paste, the above command is the exception since you need to modify it if your hard drive is not named "Macintosh HD".  The tricky part is with spaces in the name of the hard drive.  You have two choices to get the shell to interpret paths with spaces in them.  Either use quotes (see this reference on using quotes in UNIX http://www.tutorialspoint.com/unix/unix-quoting-mechanisms.htm) or you can use the easier method of using backward slashes before the spaces (\ ) to signal a space should be present.  Using backslashes in the above command, since the hard drive is named "Macintosh HD", the name is entered as Macintosh\ HD.  If your hard drive was named "Super Mac New HD", the name would be entered as Super\ Mac\ New\ HD or the full command would be:

$ sudo rm /Volumes/Super\ Mac\ New\ HD/System/Library/CoreServices/PlatformSupport.plist

Finally entering the command as sudo is required (you should prompted for your system password).  


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: complicatedPARI on November 24, 2014, 05:36:15 AM
Zillion thanks to Netkas.org forum and especially to MacEFIRom. I bought an early 2006 imac 4.1 for 40 bucks ( from surplus auction). It had 2 gig ram and was kinda slow. After running the firmware tool, the model identifier now says iMac 5.1. I also already loaded 4 gig memory to the machine.

Once again, Thank you very much.
 


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: SharpKat on January 17, 2015, 08:10:26 PM
Anyone know if there is work around to run Mavericks/Yosemite after this mod ... or are we stuck with Lion?

I found this.
[url]http://oemden.com/sixty-four-on-thirty-two-sfott/privatetest//url]

And this.
[url]http://osxhackers.tk/Mountain%20Lion//url]


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: edcaret on January 22, 2015, 01:31:43 PM
Hello, there is a fix for make boot linux with imac 4.1 with 5.1 firmware ?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: popsfiore10 on May 09, 2015, 06:04:12 PM
I have an earlier IMac 17.  I successfully upgraded the processor but when I try to run the firmware updater the program it quits unexpectedly.  The report given is:

Process:         iMac41-iMac51 Firmware Tool [157]
Path:            /Volumes/NO NAME/iMac41-iMac51 Firmware Tool.app/Contents/MacOS/iMac41-iMac51 Firmware Tool
Identifier:      com.apple.ASApplication
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  launchd [72]

Interval Since Last Report:          8505 sec
Crashes Since Last Report:           15
Per-App Interval Since Last Report:  0 sec
Per-App Crashes Since Last Report:   15

Date/Time:       2015-05-09 11:00:08.848 -0600
OS Version:      Mac OS X 10.5.8 (9L31a)
Report Version:  6
Anonymous UUID:  108614D4-10D1-4D51-A6EB-3CBE2690F84E

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  unknown required load command 0x80000022

My Hardware information is: 
Hardware Overview:

  Model Name:   iMac
  Model Identifier:   iMac4,1
  Processor Name:   Intel Core 2 Duo
  Processor Speed:   2.33 GHz
  Number Of Processors:   1
  Total Number Of Cores:   2
  L2 Cache:   4 MB
  Memory:   1.5 GB
  Bus Speed:   667 MHz
  Boot ROM Version:   IM41.0055.B08
  SMC Version (system):   1.1f5
  Serial Number (system):   W86330EPU2N
  Hardware UUID:   00000000-0000-1000-8000-0016CB9010F2

Is this machine too old for this firmware upgrade?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: golden_age_green_lantern7 on May 21, 2015, 09:58:36 PM
OK, question...  I've swapped out CPUs and upgraded my early 2006 2 gig Core Duo to a 2.33 Core 2 Duo (Intel Core 2 Duo Mobile T7600 SL9SD 2.33GHz 4MB 667MHz Socket M Dual-Core CPU).  Everything works fine, and we are running 10.6.  I have 4 gig of memory ready to pop in, and so decided to try and flash the 4.1 ROM to 5.1.  

I downloaded the firmware patch, unzipped it, and ran it.  Everything seems good, it unpacks the ramdisk, instructs me to switch off the system, and hold the power button until the power light flashes or I hear a long tone.  I'm told at that point the apple logo on grey screen will appear with status bar.  

I follow the instructions to a T, and the power light flashes with long tone, power button released.  In a few seconds, I get a gray screen.... but with the question mark folder.

I've tried this a dozen times, changing the timing of releasing the power button but same thing each time.  The hard drive boots just fine (still shows 4.1), and I've run the disk utility on it to be sure; all ok.  I infer this is NOT the way this is supposed to happen.  

So stupid question(s)... is the whole shutting down and holding onto the power button supposed to reboot me into the ramdisk?  (I thought ramdisks were wiped at power off?  And yes, my PRAM is new and fully charged.)  Am I supposed to run something from the RAM disk before I shut down the mac?  Is there an alternate way to acomplish this?

Any suggestions?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Codeyderp on May 30, 2015, 06:20:04 AM
OK, question...  I've swapped out CPUs and upgraded my early 2006 2 gig Core Duo to a 2.33 Core 2 Duo (Intel Core 2 Duo Mobile T7600 SL9SD 2.33GHz 4MB 667MHz Socket M Dual-Core CPU).  Everything works fine, and we are running 10.6.  I have 4 gig of memory ready to pop in, and so decided to try and flash the 4.1 ROM to 5.1.  

I downloaded the firmware patch, unzipped it, and ran it.  Everything seems good, it unpacks the ramdisk, instructs me to switch off the system, and hold the power button until the power light flashes or I hear a long tone.  I'm told at that point the apple logo on grey screen will appear with status bar.  

I follow the instructions to a T, and the power light flashes with long tone, power button released.  In a few seconds, I get a gray screen.... but with the question mark folder.

I've tried this a dozen times, changing the timing of releasing the power button but same thing each time.  The hard drive boots just fine (still shows 4.1), and I've run the disk utility on it to be sure; all ok.  I infer this is NOT the way this is supposed to happen.  

So stupid question(s)... is the whole shutting down and holding onto the power button supposed to reboot me into the ramdisk?  (I thought ramdisks were wiped at power off?  And yes, my PRAM is new and fully charged.)  Am I supposed to run something from the RAM disk before I shut down the mac?  Is there an alternate way to acomplish this?

Any suggestions?
Same issue here!


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: golden_age_green_lantern7 on June 04, 2015, 01:42:07 AM
Help!  Suggestions anyone?  I've scoured the forums to see if someone else has solved a similar problem flashing ROM on another system, to no avail.

Possible issues I've already addressed:
the ROM flashing tool only works on Mountain Lion, check.
Clear PRAM right before running the tool, check.
Made sure I'm running OS on an internal drive (not USB), check.
Currently using latest version of 4,1, check
downloaded fresh version of the tool, check.
Nothing else plugged into the Mac besides keyboard and mouse (no DVD in drive, no USB drive), check.
Brand new PRAM battery, check

These are the only possible problems I've found on this forum or elsewhere... I've even made sure I'm running a fresh install of Snow Leopard to ensure there are no other possible software conflicts.

Are there any other issues that might cause a problem?  Like I said above, everything else works perfectly, and the installer tool appears to run fine, and sets up the RAMDisk OK.  I hold down on power button until flashing light and long tone, but then I get the flashing "question mark folder", which I would assume means it can't boot from the RAMdisk.  Ive even tried making a copy of the RAMdisk on CDROM and then trying to boot from that right after running the tool and shutting down; same thing: question mark folder.

So:
1) is there something I am missing?  Anything else that might be askew?
2) is there anyway else I can flash the ROM?

Suggestions?  Please?  I'm  at wit's end and pulling out my hair trying to figure out what I'm overlooking.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: curtis on June 08, 2015, 05:28:35 AM
Might this be possible for the iMac4,2 as well, please? Thank you!

Anyone found a way to upgrade/change firmware iMac4,2 to iMac5,2 ?

I think we need to go from IM42.0071.B03 to IM52.0090.B09

I'll even take a manual recommendation.

Thank you.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: bookwormsit on June 26, 2015, 12:28:52 AM
hi i have imac 4,1 im wanting to make it support more than 2gb of memory its a 20" model 2.0ghz core duo processor i downloaded program but can't seem to make it work could you tell me what im doing wrong please? sorry im a half newbie to mac stuff and imac's still learning :-)


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: mattshacks on September 07, 2015, 10:39:52 PM
Quote
Date/Time:       2015-05-09 11:00:08.848 -0600
OS Version:      Mac OS X 10.5.8 (9L31a)
Report Version:  6
Anonymous UUID:  108614D4-10D1-4D51-A6EB-3CBE2690F84E

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread:  0

Dyld Error Message:
  unknown required load command 0x80000022

@popsfiore10 :

I have the same issue but on a Mac Pro 1,1

Did you find a solution for this ?

Thanx


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: lilos on September 15, 2015, 11:42:10 PM
Mac EFI Rom Can you tell as how you remove check in apple efi update app that allow to update same version firmware.
My macbook 1.1 to libreboot patch work only on macbook 1.1 with bootrom 1.0

If you have 1.1 bootrom it refuse to update.


If anyone have macbook 1,1 with bootrom 1,0 i can make patch to update to macbook 2,1


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: Sebinouse on September 20, 2015, 04:41:10 PM
Mac EFI Rom Can you tell as how you remove check in apple efi update app that allow to update same version firmware.
My macbook 1.1 to libreboot patch work only on macbook 1.1 with bootrom 1.0

If you have 1.1 bootrom it refuse to update.


If anyone have macbook 1,1 with bootrom 1,0 i can make patch to update to macbook 2,1

Wrong thread ... it has already been asked ... and answered !

Here (http://forum.netkas.org/index.php/topic,11172.msg31157.html#msg31157)


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: ItzMatrox on April 23, 2016, 11:48:31 AM
Hey, I updated the frimware. First of all. I couldn't install Lion without making modifications on it. Okay that wasn't too hard. But since I updated the frimware the LED next to the ISight camera is on as soon as I turn on the mac, and I can't use it. Can someone help me please?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: miguej on May 21, 2016, 08:42:19 AM
Hello,

I did the firmware upgrade from 4,1 to 5,1 long time ago. And, of course, install Lion.

But now, apple says that "Lion & Mountain Lion are dead" so I've tried upgrade to Mavericks...but no success at all.

Obviously, I known about EFI32 and so...but every time y did a bootable mavericks usb (from several methods) my imac doesn't boot.

If I use the "verbose" option it seems to get stuck at early start...usualy al "PCI" section...

Also (for information) I have used different usb sticks...

So, it is impossible upgrade (even installing) Mavericks on my mac?

Hardware changed to imac 4,1 --> Core 2 Duo T7200 and 4gb ram

Thanks


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: miguej on May 21, 2016, 11:41:08 PM
Update, here is a photo using verbose boot
(see attach)


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: chukgek07 on June 04, 2016, 03:49:41 PM
I did the firmware upgrade iMac from 4.1 to 5.1 .
How to make work adapter miniDVI to HDMI ? It does not display on TV or video or audio.


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: qlka8402 on August 13, 2016, 02:09:40 PM
Hello, im new user of iMac early 2006, i change processor to t7600 and i need change efi now from 4.1 to 5.1, what i must to do first? i have firmware tools, install it i reboot iMac and nothing. Always i have 4.1, why? Is any tutorial how to make 5.1 from 4.1 (youtube)?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: trdavis55 on September 08, 2016, 11:37:11 PM
The firmware tool is failing to install, quit unexpectedly.
I have changed the CPU to 2.33 Duo core, and am still using the original RAM.
Thoughts on how to complete the firmware upgrade?


Title: Re: iMac4,1 and iMac5,1 Firmware Tool Released
Post by: maxfix on December 25, 2018, 06:28:58 PM
Any hope for iMac5,2 users to have more then 3GB RAM? I just tried 2 x 2GB and it gives me black screen on boot.