With OpenCore, you should only need FwRuntimeServices.efi.
OcQuirks is FwRuntimeServices.efi + the Aptio fix parts of OpenCore.
For me, I can enable IGPU and boot by doing the following:
- Copy OpenCore EFI folder to EFI partition of your main system drive.
- Clear CMOS.
- Unlock MSR.
- Make all necessary changes to BIOS settings.
- Boot in to macOS via OpenCore.
Once you have it working, you must do the following to keep it working:
- Do not boot Clover.
- Do not boot from USB.
- Do not boot from other EFI partitions.
- Any of the above can break the ability to boot from OpenCore with IGPU enabled.
- If/when it breaks, you must clear CMOS again and repeat above steps 2-5.