UPDATE: Since a lot of people had been downloading the EFI for
Catalina, I have made some edits to the guide to re-instate specific instructions for
macOS Catalina where needed.
There are only two
IMPORTANT differences for success with Catalina (different from
Big Sur)...
- If your installing Catalina pay close attention to the section on creating the installer especially the need to delete the Installlnfo.plist file from the Catalina installer app.
- For Catalina the SMBIOS must be iMac19,1
I have updated the OpenCore EFI download to include a config file specific to Catalina (see attachment in 1st post). Catalina users will have to replace the config.plist in the
EFI/OC folder with the Catalina config file.
**Remember to edit the config.plist and put in your own MLB, SystemSerialNumber and SystemUUID.