GUIDE How to Enable AMD RX 6800, RX 6800XT and RX 6900XT on macOS Big Sur and Later

[Peji]

What's your GPU manufacturer and in which slot you have installed?

It's a XFX SPEEDSTER MERC319 RX 6900XT - 16G/HDMI/DP/USB-C
I installed it in the PCIE_X16/X8_1 slot.

 

[EliteMacx86]

It's a XFX SPEEDSTER MERC319 RX 6900XT - 16G/HDMI/DP/USB-C
I installed it in the PCIE_X16/X8_1 slot.

Okay. XFX are bit problematic. Is IGPU enabled in BIOS? Your configuration is not as per the guide.

 

[DerSnitzki]

Holy Shit man, greatest and biggest thanks for this post! it helped me a lot and everything is running smooth and powerful now, thank you

 

[EliteMacx86]

Holy Shit man, greatest and biggest thanks for this post! it helped me a lot and everything is running smooth and powerful now, thank you

Enjoy

 

[GixxerJ]

Hello and thanks for this thread!

I'm still unable to get my XFX Merc 319 RX 6900XT to work...
Everything else seems to work so far (Ethernet, WiFi, all USB ports)
I haven't checked audio yet.... the lag in the UI is annoying enough that I want to get that solved first.

Full disclosure, I followed your guide twice, and neither time could I get the os to boot.... Not sure what I was missing.
I ended up following the dortania guide and it worked. I booted to 11.3 and then upgraded to 11.6.1 with no issues.

I've attached the PR files as requested.... Hoping for some guidance!

Thanks!

Specs:
Everything is stock, no OC
Ryzen 9 5900x 12 Core, 3.7GHZ
MSI MAG X570
XFX Merc 319 Radeon RX 6900 XT
64 GB DDR4000
2TB Samsung 980 PRO M.2

 

[EliteMacx86]

Hello and thanks for this thread!

I'm still unable to get my XFX Merc 319 RX 6900XT to work...
Everything else seems to work so far (Ethernet, WiFi, all USB ports)
I haven't checked audio yet.... the lag in the UI is annoying enough that I want to get that solved first.

Full disclosure, I followed your guide twice, and neither time could I get the os to boot.... Not sure what I was missing.
I ended up following the dortania guide and it worked. I booted to 11.3 and then upgraded to 11.6.1 with no issues.

I've attached the PR files as requested.... Hoping for some guidance!

Thanks!

Specs:
Everything is stock, no OC
Ryzen 9 5900x 12 Core, 3.7GHZ
MSI MAG X570
XFX Merc 319 Radeon RX 6900 XT
64 GB DDR4000
2TB Samsung 980 PRO M.2

Incomplete PR files attached.

IOReg is missing. Also, provide your BIOS settings. In which PCIe slot have you installed the GPU?

 

[GixxerJ]

Incomplete PR files attached.

IOReg is missing. Also, provide your BIOS settings. In which PCIe slot have you installed the GPU?

Is the Details/ioreg.txt in the zip not what you were looking for regarding IOReg?

Re bios settings - is there a preferred format / way to dump? What in particular are you looking for?

Card is installed in slot PCI_E1 (closest to CPU)

 

[EliteMacx86]

Is the Details/ioreg.txt in the zip not what you were looking for regarding IOReg?

Use IOReg App to save the copy of your IOReg.

Re bios settings - is there a preferred format / way to dump? What in particular are you looking for?

Screenshots in a .zip file.

Card is installed in slot PCI_E1 (closest to CPU)

The first PCIe slot?

 

[GixxerJ]

Attached are the BIOS screenshots.

Sorry about the ioreg confusion, attaching the output from the app, hopefully I got it right.

And yes, PCI_E1 is the 1st PCIE slot.

 

[EliteMacx86]

Attached are the BIOS screenshots.

Sorry about the ioreg confusion, attaching the output from the app, hopefully I got it right.

And yes, PCI_E1 is the 1st PCIE slot.

Seems like your Device ID is different than what Apple actually supports. The Mac compatible Card uses 73BF, whereas, your Card uses 73AF. Flashing VBIOS can potentially fix the issue.