OCB: LoadImage failed unsupported error!

[tarkomate99]

Hi im trying to install High Sierra for education!

My Setup:
CPU: Ryzen5 3600x
RAM: 16GB HyperX Fury BEAST
Motherboard: B450 Aorus Elite
GPU: AMD HD6670 1GB

And i got this error, after first restart:
OCB: LoadImage failed unsupported

Can someone help me?

My files:

 

[Edhawk]

Try this revised EFI, hopefully it will work with your AMD 6-core setup.

The error was caused by the Kernel >Quirk > SecureBootModel being set to Default, when it needs to be set to Disabled for High Sierra.

I changed the PlatformInfo to MacPro6,1, as that is probably a better match with your old Radeon HD 6670 dGPU. iMac14,2 expects an IGPU to be present, which no AMD systems have.

Just rename the folder to EFI and it should be good to go.

 

[tarkomate99]

Wich efi folder copy to boot pendrive? Under macosx folder or other? I got this after copy.

IMG 20220403 003848

Image IMG 20220403 003848 hosted in AMD OS X Images

img.amd-osx.com