did you get it fixed? I had the same issue and fixed it using:
https://www.insanelymac.com/forum/topic/345580-spoofing-gpu-device-id-b450m-amd-firepro/
Done, rebooted but still no change :(
I have moved the EFI off my USB now and added to my EFI partition. Is there a way to check if my change was used? do i need to clear nvram or anything?
I've tried to use the Dortania guide to spoof the Device ID to an R9 390x as described but it doesnt seem to be working
When I use this path the PCI GPP bridge gets changed not the r9 390 as the bridge is PCI0/GPP8
where as i read the GPU as PCI0/GPP8/GFX0
I use this GPU_SPOOF
but still...
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