- Joined
- May 10, 2011
- Messages
- 2,923
- Motherboard
- Gigabyte B550 Vision D
- CPU
- Ryzen 5900X
- Graphics
- RX 6800
- Mac
- Classic Mac
- Mobile Phone
Which chip are you using (ie. model)? Comet Lake or Rocket Lake? If using Comet Lake you may have to change the AAPL,ig-platform-id to 03009BC5 for Core i9 or 03009BC8 for Core i5. 03 is the iGPU headless mode (you have to enable it in BIOS as Auto). You will also need to change the corresponding device-id in Device Properties to reverse byte order ie. C59B0000 or C89B0000.What was your upgrade process? I have the same MB+CPU & was able to replicate your guide successfully for High Sierra. But bootstrapping or upgrading with Catalina doesn't work & open core debugging is unavailable for me to troubleshoot further. (using exact same EFI folder w/appropriate serials/keys gen'd)
In addition you may need to disable Setup > IO Ports > Resizable Bar and enable Rocket Lake Thunderbolt if using the latest firmware. For AMD cards you’ll need to add shikigva=128 agpdmod=pikera as boot-args in the NVRAM. For Nvidia you could try no boot-args other than alcid=7 value or shikigva=256.
I would try sticking with OC 0.6.5 with Catalina for the time being because 0.6.8 has some sticky issues booting with Catalina.
Make sure your AppleEvent is set to Builtin and not OEM.
Also I’d advise you should keep your UUID the same (because it is your main Disk’s UUID).
When you change the config.plist or use my EFI do not forget to boot with it first, reset your NVRAM by pressing the space bar and selecting Reset NVRAM before rebooting and selecting the drive again.