At first I thought that my upgrade to Ventura had gone smoothly, until I noticed the window closing animation being very sluggish. Checking with Hackintool, I saw Quartz Extreme (QE/CI) inactive and Metal unsupported. After finding out that Ventura had dropped support for AMD's GCN 1-3 (7000 - R9 series) GPUs, I investigated the process for making my R9 280X work using OCLP.

Modifying the system with OCLP Requires SIP, Apple Secure Boot and AMFI to be disabled so there are some compromises in terms of security.

Prepare the System

Initially the following changes are required in the config.plist :

• In the NVRAM section boot-args add temporarily:
  • amfi_get_out_of_my_way=0x1 -no-compat-check
• Also SIP needs to be disabled with a csr-active-configsetting of
  • 03080000

SIP Status as shown by MenuBarSIPDetector

• Additionally in Misc - Security set SecureBootModel to
  • Disabled
• Notes:
  • -no-compat-check was probably not required
  • amfi_get_out_of_my_way=0x1disables Apple Mobile File Integrity validation. Required for applying Root Patches with OCLP. It is ONLY needed for re-applying root patches with OCLP after System Updates.

Reboot the system.

Patch with OCLP

Download and launch OCLP and click on Post-Install-Root-Patch

• if you have one of the applicable graphics cards, it will show it as an available patch for your system.
• Start the patching
• Reboot to check that everything is working. Hackintool should show Quartz Extreme (QE/CI) as active.
• For me disabling AMFI strangely caused Firefox to hang upon launch. Disabling AMFI is not needed any more for booting, therefore follow the next steps.

Add AMFIPass.kext

Download https://github.com/Dortania/OpenCore-Legacy-Patcher/blob/main/payloads/Kexts/Acidanthera/AMFIPass-v1.4.0-RELEASE.zip (or newer) and add it to your OpenCore EFI as well as your config.plist

With the AMFIPass kext loaded amfi_get_out_of_my_way=0x1 is no longer required for booting.

Therefore make the following changes in your config.plist :

• In the NVRAM section boot-args revert to your previous settings by removing:
  • amfi_get_out_of_my_way=0x1 -no-compat-check

So far everything is working for me as expected. Additional settings might be required as well, based on 5T33Z0. Please share these in the comments.

References/Sources:
- OCLP Documentation
- Helpful notes by 5T33Z0 about using OCLP