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 1 
 on: November 18, 2020, 07:52:35 PM 
Started by Fl0r!an - Last post by xbomber2002
To Fl0r!an
Hi, i jus bought a Sapphire R9 270X 2GB Dual-X for my Mac Pro 5,1 (E271 CURACAO XT GDDR5 64Mx32 2GB 150e/150m, DevID: 0x6810) and i need to flash it for mac EFI boot. By using the default bundle from netkas (http://forum.netkas.org/index.php/topic,5619.0.html) and following his guide, i partially succeed. Although EFI is working and the boot menu is showing by pressing the alt key, i cannot go further than that. If i boot Mojave or catalina (apfs partition) i get a black screen in the last stage when the OS try to load the graphic extension. Also only one DVI port is working but no problem it’s enough for me.
I would be pleased if you can PM me a working modified ROM fitting my card configuration.
I see in another forum that someone had success in flashing his card by executing the script from an « upgraded » netkas bundle2 where the efiromheader is replaced by one called "efiromheader_7950.rom". Unfortunately no way to find this upgraded bundle2 in the net. Any advise is welcome.Thanks in advance.
PS: My card with his original pc bios work perfectly with acceleration in Mojave apart the inconvenience of not being able to manage the pre/early boot stage (no EFI boot screen)

 2 
 on: November 14, 2020, 05:08:46 PM 
Started by Rominator - Last post by FlorisVN
interessting, seems more and more roms for iMac compatible cards are being dumped here :

https://forums.macrumors.com/threads/2011-imac-graphics-card-upgrade.1596614/

 3 
 on: November 14, 2020, 12:36:22 AM 
Started by Rominator - Last post by Spacedust
New driver:

https://images.nvidia.com/mac/pkg/387/WebDriver-387.10.10.10.40.140.pkg

 4 
 on: November 10, 2020, 01:23:55 PM 
Started by netkas - Last post by Bunga-Bunga
Please attach all your rom-files. I'll have a look.

 5 
 on: October 29, 2020, 04:08:21 PM 
Started by netkas - Last post by Lxixboss
Talk about necro...

Anyway, I am running a 2009 Mac Pro 4.1 that has been flashed to 5.1... currently running Catalina 10.15.7... all is good.
Video card is a PCS HD 7870 and I cannot seem to generate the efi rom correctly. Here is what I am doing and perhaps someone can point out what I am doing wrong.

1- Latest JDK is installed
2- Downloaded netkas bundle, and placed all files from that bundle into the root level of the Mac's user account.
3- Ran GPUz from windows and got device id (679E)
4- Used ATI Winflash to save original ROM as cardname.rom in the same directory
5- Ran the script replacing the device ID with the 679E retrieved with GPUz.
6- Here is the script I ran and the output I got in Terminal:
./makerom.sh --efifile=7950mac.efi --romfile=efiromheader.rom --originalrom=cardname.rom --devid=679E
running on 7950mac.efi, efiromheader.rom with devid 679E
Patching files 7950mac.efi, efiromheader.rom for device-id 0x679E
Successfully patched efi file
Successfully patched efi rom file
./makerom.sh: line 42: /Users/user/EfiCompress.macosx: Bad CPU type in executable
dd: 7950mac.efi.comp: No such file or directory
EFI part is ready at 679E.efipart.rom
orig size - 65536
65536+0 records in
65536+0 records out
65536 bytes transferred in 0.359645 secs (182224 bytes/sec)
rm: 7950mac.efi.comp: No such file or directory
Before:
OpRom (size=65536, indicator_offset=0x235, indicator=0x0, checksum=0x80)
OpRom (size=48128, indicator_offset=0x31, indicator=0x80, checksum=0x0)
RawData (size=17408)

After:
OpRom (size=65536, indicator_offset=0x235, indicator=0x0, checksum=0x80)
OpRom (size=48128, indicator_offset=0x31, indicator=0x80, checksum=0x83)
RawData (size=17408)
the rom is ready at cardname.rom.efi.rom

So, the script seems to report three errors. The first one is:
./makerom.sh: line 42: /Users/user/EfiCompress.macosx: Bad CPU type in executable

The second one (in the very next line) is:
dd: 7950mac.efi.comp: No such file or directory

The third error, a few lines later, seems to be an echo of the second:
rm: 7950mac.efi.comp: No such file or directory

I also note that the sizes of both ROMs seem to be the same.

When I reflash the card in Windows with ATI Winflash, it still works but there is no boot screen.

While I am by no means adept in coding, I do have eyes. When I open both the original ROM and the post-script ROM side by side in a text editor, it seems that both ROMs are the same except for the very end where what seems to have been a bunch of placeholders in the original ROM has been replaced by a header of some sort containing copyright information and not much else. (If someone wants me too, I can post the different section of the ROM).

I am, however, expecting one of the gurus on this site to quite easily spot a dumb mistake that I have made and quite simply point me in the right direction. Keeping my fingers crossed up here in Canada.

 6 
 on: September 26, 2020, 04:48:27 PM 
Started by Rominator - Last post by vgermax
New driver:
https://images.nvidia.com/mac/pkg/387/WebDriver-387.10.10.10.40.139.pkg

 7 
 on: August 17, 2020, 08:04:29 PM 
Started by toke lahti - Last post by Spacedust
5500 will work just fine.

 8 
 on: August 16, 2020, 04:12:20 PM 
Started by toke lahti - Last post by toke lahti
....and problem solved!
Somehow nvidia's webdrivers were dropped off.
Installing them again with PW and now I can order 5500 and use my apple-adapter.

Now just to find a nice cheap mechanical dp switch, so I can check easily what's happening in old mini2012...

 9 
 on: August 16, 2020, 03:12:05 PM 
Started by toke lahti - Last post by toke lahti
Oh well, just found out, that screen is blank, even with straight DL-dvi cable...

 10 
 on: August 16, 2020, 02:48:08 PM 
Started by toke lahti - Last post by toke lahti
Notable is, that SysInfo tells that Apple's adapter is connected, right rez and also display tells all right freqs, but the screen is blank.

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