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Thanks for the info, but I think the hardest part in flashing the AMD card is not how to get the EFI, but how to fix the mismatched framebuffer personality.

Found some interesting files located in the latest 10.14 beta 4 installer, maybe these can be reversed engineered to flash Apple-EFI to newer AMD GPUs.

Hi all,

The Imac 9,1 was only made with dual core Socket P CPU's with a TDP limit of 35Watt.

Is it possible to change/remove this limit from the ROM so one can use a Quad core CPU like the Q9100?

The CPU can be removed as it is socketed.

You have s standard rom version so this patched version doesn't work on your machine. Try to download the original program posted By  macefirom (page one).

Just wanted to chime in and thank the original poster and Ant0 for figuring out that there were different ROM ids on the 1,1.

Mine was clearly a replacement mobo with no serial # and an id of MP11.005D.B00.0708280936, I used the Apple serializer to add in the serial number off the machine tag--instant SMC update, and a lot of commotion (fans running high speed etc.)

Then I could not figure out why the 2,1 upgrade would not run. Started fresh this morning and found Ant0's patched version, and voila--done. Took 2 boots as before to find both processors.

Running a clean install of OSX 10.7.5

Now I need to put the original memory boards/memory/vid card back in to see if I have additional problems that were not showing up--but as of right now--I'm a happy boy!!!

Morning All!

  Hoping there are still people who are reading this thread!  Having an issue getting up to 2,1.  I have a stock (2x Dual) 2.66ghz.  When running the tool I receive the rather annoying 5570 error when trying to download the scripts.  I've tried to edit the patch file to no avail for my firmware.  Internet access is available.  Probably doing it wrong. This is a fresh install of SL 10.6 upgraded to 10.6.8  ANY help is greatly appreciated.  Spent a bunch of hours on it already

Here my system stats:

Model Name: Mac Pro
Model Identifier: MacPro 1,1
Processor Name: Dual-Core Intel Xeon
Processor Speed: 2.66GHz
Number of Processors: 2
Total Number Of Cores: 4
L2 Cache: 4MB
Memory: 32GB
Bus Speed: 1.33GHz
Boot ROM Version: MP11.005C.B08
SMC Version (system): 1.7f10

https://forums.macrumors.com/threads/mac-pro-3-1-and-vega-fe-10-13-4.2121393/

Different thread, same cause

He needs to make this more clear in his pages. This is multiple people all confused by lack of info.

3,1 doesn't support real AMD drivers for HS per his pages, so he uses Sierra drivers and Frameworks.

Breaks Nvidia GPUs, breaks newer AMD GPUs.

That's my system and it refuses to boot with the VEGA FE installed (well, Windows works). The real issue being that High Sierra drivers require SSE4.2, which Penryn / Harpertown does not support.

Has anyone made progress getting any driver after 378.10.10.10.25.106 to fully work (OpenGL/CL) with dual GPU's? Thanks

Hello,
First let me start out that.I have been running high Sierra on my iMac with a 780m installed. What you need to do is have your first partition on your drive one that you never modify. You always need this partition to work in order to boot into other OS's/installers. For solving the modified kext issue, you need to burn high Sierra to a flash drive. In the OS you are booted into now, go to system prefreneces choose a startup disk and select the high Sierra installer drive. Your system will reboot into the high Sierra installer. Open terminal and type csrutil disable. While booted change your startup disk from the Apple menu back to your previous OS. I never used Sierra with the 780m installed because I was aware of having to modify applegraphicsdevicepolicy every OS update. If you were to install High Sierra I believe you will run into issues because your iMac can't update the EFI for APFS support. Id try to find a version below 10.13.4 .

Rominator, I pulled my EFI flashed gtx 970 from my Mac Pro and it installed into my akito node thunder 2. It doesn't display my iMacs EFI startup screen. It doesn't display video either when patched with the egpu.io purge Wrangler. The card will show up in system profiler /graphics, same goes for my rx480. I believe with the 780m installed ePGU's aren't functioning properly since this setup was working before my 780m swap. This was with "sudo nvram enable-legacy-orom-behavior=1" added.

[sudo kextcache -system-prelinked-kernel]

Sure I can give a bit of context.

So I purchased a Dell Alienware branded GTX 770M (MXM) card for my A1312 i7 2600s iMac since I had a 6970M ATi video card. The card at first was not working on El Capitan until some updates to the plist KEXT to add the MAC ID to the KEXT. It worked like a charm up until more recent updates of Sierra OS (within 10.12.1). I had the mini DP/Thunderbolt output working for my iMac (haven't tested recently) as I'd tested a thunderbolt to HDMI out to a  BenQ Gaming monitor I had at the time.

So the issue is now since updating to the latest security patches with Sierra OS, is that if I restart my computer I can't boot it up as it will not go to the Apple loading logo UNLESS I take my SSD out of my computer, plug it into a MacBook Air also with Sierra OS 10.12.1, boot into my OS externally, and run the following commands making sure SIP is off;

sudo kextcache -system-prelinked-kernel
and then run this after it is done
sudo kextcache -system-caches

Now if I run the above commands while running my current hardware in my iMac, I get an error that says "Untrusted kexts are not allowed", but if I run it on the MacBook Air as mentioned, it works perfectly fine.

It's been months since I've actually updated or restarted my iMac. Hell I even put it on a UPS just in case there is a power outtage while I'm gone, just to make sure it will not shut down or restart unexpectedly.

nmano, to be clear you are on Hackintosh, yes?

Yes Its hackintosh please look
https://www.insanelymac.com/forum/topic/334898-pre-release-macos-mojave/?do=findComment&comment=2624866

Done the APFS thing.

No real advantage I saw, just meant 3,1 got the tedious text that 4,1 has suffered with since HS came out.

Also, the Windows issue is not resolved, that I know of.