So, why you are giving advice for Mac Pros?
All NAVI 2x GPUs require UEFI v2.xx and are not compatible with EFI v1.10 of MacPro5,1 unless the GPU firmware is patched. A MacPro5,1 can't even power on with a NAVI 2x card with the factory firmware.
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MP All Models AMD Radeon RX 6800 XT / 6900 XT for macOS?
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All NAVI 2x GPUs require UEFI v2.xx and are not compatible with EFI v1.10 of MacPro5,1 unless the GPU firmware is patched. A MacPro5,1 can't even power on with a NAVI 2x card with the factory firmware.
At the risk of asking an already-answered question... is this doable booting an intel Mini or MBP under windows with the card in an eGPU?
Yes. the hackinstosh is working as iMacPro. I do have Mac Mini m1 and MBA m2 though.
That's how I did this on my 7,1 because I didn't have the right power cables to connect the video card internally.
Hi Guys if if I understand correctly, video cards with ID 73AF even spoofing with macOs don't work on real macs? Even if they do an SSDT? MaLd0n owner of olarila.com manages to make an ssdt for you, as he did for my Hackintosh Raptor Lake, core i9-13900k, with my Aorus AMD RX 6900 XT Gigabyte. Wonderful!!! Running smoothly and powerfully!!! Just to make your mouth water follows the Geek.
Hackintosh is so much better than real Mac!
Hackintosh is so much better than real Mac!
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6900XT? That should work provided it is flashed (for 5,1 Mac Pro), also provided it isn't too long to fit and needs Pixlas mod to provide power. The PSU isn't the problem, it's the amount of power available through on the on-board power sockets.
For Mac Pro 7,1, provided the length of the card is okay this should work without needing any other updates.
The flashing of the card firmware is needed to get around a problem that occurs when booting up the old Macs.
If I was game enough to do pixlas mod I could have flashed a 6900XT and installed it on my 5,1 which has RX6600XT.
Do you not mean the 6950?
For Mac Pro 7,1, provided the length of the card is okay this should work without needing any other updates.
The flashing of the card firmware is needed to get around a problem that occurs when booting up the old Macs.
If I was game enough to do pixlas mod I could have flashed a 6900XT and installed it on my 5,1 which has RX6600XT.
Do you not mean the 6950?
Yes, 6900 XT Aorus, but I have a Desktop iMacPro1,1 SMBIOS, with a Corsair Crystal series case that fits and the motherboard also favors it. But in Hackintosh it doesn't recognize it natively, because it has ID 73AF, and you need to change it in SSDT to 73BF and it runs smooth, silent, and powerful!
Look there, people are using the Gigabyte card in Mac Pro 7,1 without bother. Where it gets more tricky is when you want to use that with the 5,1, that's where you need to flash the firmware of the card using a Windows machine of some sort (Mac Pro 7,1 on Windows 11 was how I did my RX6600XT).
Unless there is another version of the Gigabyte Aorus card?
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There are two versions, rev 1 (73BF) and rev 2 (73AF) which is my board. Have two cards model from Gigabyte too. Mine is Aorus, there is OC Gaming. There is the reference card, but AORUS stands out for the quality issue, and I will not update the ROM (flash bios) or modify it, maybe if it is safe, the firmware, but Hackintosh is quiet, after a while with I'm sure the Dortania and GitHub team will update Opencore's WhateverGreen.kext. 
So i recently purchased a dell 6800xt for my macpro 5,1. I'm running big sur 11.6, and have noticed some odd booting issues.
During boot there is a delay between osx taking over the control of the graphics card. Eg with my vega 64 you see the apple logo and progress bar upto a certain point, then the screen flashes and you see the progress bar again for a split second, then the login prompt. However with the 6800xt there is a long delay instead of a brief flash, long enough for the monitor detect no signal and start counting down into powersaving mode (say 10 seconds).
This delay with the 6800xt also seems to be intermittent, some times the screen just stays black. (maybe related to which of my monitors is the primary (eg shows apple logo/progress bar) but haven't done enough testing to say that for sure). The systems however boots fine without the displays loading, as I can login via ssh or vnc.
Just wondering if anybody else has had similar issues?
During boot there is a delay between osx taking over the control of the graphics card. Eg with my vega 64 you see the apple logo and progress bar upto a certain point, then the screen flashes and you see the progress bar again for a split second, then the login prompt. However with the 6800xt there is a long delay instead of a brief flash, long enough for the monitor detect no signal and start counting down into powersaving mode (say 10 seconds).
This delay with the 6800xt also seems to be intermittent, some times the screen just stays black. (maybe related to which of my monitors is the primary (eg shows apple logo/progress bar) but haven't done enough testing to say that for sure). The systems however boots fine without the displays loading, as I can login via ssh or vnc.
Just wondering if anybody else has had similar issues?
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What version of OpenCore are you using?
You may need to post this question in that thread instead of here, as it probably has something to do with your config (i.e. GOP) rather than the GPU itself.
Two version, both exhibt the same odd behaviors.
OCLP versions:
- 0.6.1
- 0.4.3
Possible i suppose, just assumed because it was working fine with the vega64 that it wouldn't be opencore related and more 6800 related. Wondering if anybody else had the long delay (5-10secs) in the boot process where the apple logo and progress bar disappeared, or any monitor incompatiblties (odd i know) people have faced with their 68xx or 69xx cards.
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These are OCLP version numbers, no? If these are OC version numbers, it's ancient versions. OC and OCLP are not the same thing.
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Yep, just occured to me that I should have specifed but you had already replied: they are OCLP version numbers.
Hoping this is within forum rules, but putting out the bat signal for anyone in the Melbourne (Australia) area with experience using the syncretic patcher on an rx6xxx series gpu. Not savvy with the flashing process, and am in an all Mac environment so unable to give it a try. Happy to pay for Batman's time of course.
Hi! Sorry for probably double asking: is it possible to still use the 6600 in a normal PC after flashing, or does it become a Mac Pro-only card? I know I can reflash the original ROM back on the card, it's just curiosity.
Thank you!
Thank you!
Works fine on both PC and Mac after flashing, no it does not turn the GPU into a Mac only card.
Sapphire Pulse RX6600 confirmed working after patching! Still have some stuttering on 4K display as I has with the HD7950 (probably CPU bottlenecks), but it runs fine. Tomorrow I'll do the Pixlas mod to my PSU and run some benchmarks.
Thank you!
Thank you!
Thought the PSU mod wasn't needed for the 6600 because it didn't draw enough power to warrant it?
It’s not. But I don’t want to stress the logic board power rails so I will do the mod to bypass them.
I bought a used ASUS AMD Radeon RX 6600 XT, patched it with your method. It runs on a MacPro 3,1 a 4,1>5,1 and a 5,1. However, the card is not registering correctly and has therefore no acceleration.
I did an OpenCore 0.6.1 clean install of Monterey 12.6.3 on all three MacPros with an ATI Radeon HD 5770 and then switched to the RX 6600 XT.
My Radeon RX 580 works perfectly fine under this conditions.
I have no idea what is missing with the RX 6600 XT, maybe I will patch the card one more time.
