Regarding the problem of not being able to shut down

Okay, try this: - Add SSDT-GPRW.aml to EFI/OC/ACPI and to your config.plist under ACPI/Add - Add this patch to your config.plist under ACPI/Patch If this doesn't fix it, also add: - https://github.com/dortania/OpenCore-Post-Install/blob/master/extra-files/FixShutdown-USB-SSDT.dsl (export as .aml) and Add to EFI/OC/ACPI and config - And ACPI/Patch to config: https://github.com/dortania/OpenCore-Post-Install/blob/master/extra-files/FixShutdown-Patch.plist