For the past couple of days (when I’m procrastinating), I’ve been attempting to make an XFX RX 460 work as a GPU passthrough on a macOS KVM.
Ready-made macOS VM
Flashing a different BIOS
# Display all adaptors detected
./amdvbflash -ai
# Get info about the rom file
./amdvbflash -biosfileinfo vbios.rom
# Save bios
./amdvbflash -s 0 original_rom
# Force flash a rom
./amdvbflash -f -p 0 ./original_rom
Where to get BIOS rom files
https://www.techpowerup.com/vgabios/
How to know which BIOS are compatible
Run GPU-Z. Take note of the memory type and size.
Setting Proxmox to use a rom file
Where are the rom files located
/usr/share/kvm/romfile.rom
How to use the romfile
vi /etc/pve/qemu
Add romfile=romfilename.rom to hostpci0.
Giving up
I think I’ve tried almost all BIOS compatible with my graphics card. I was not able to make it work.
Too much time has been spent. I could have bought a fully compatible one if I worked for the same amount of time I spent on this.
It was a good try, but I need to cut my losses (of time).