Tested on Mac OS Big Sur, Fully working + iServices.

This was my first time ever making an EFI, with lots of errors and unused entries.

Take this repository as an example to follow, but I would not personally recommend using this as is.

Disclaimer: I'm not responsible for any damage you may cause, use this at your own risk (I Strongly recommend making your own EFI).

After you've followed the guide on how to make the installation media, just download the folder in this repository, and copy it in the main directory of your installation media.

A Correctly formatted media, should contain two folders in its root:

• "com.apple.recovery.boot" - with the Mac OS "BaseSystem" or "RecoveryImage" file(s).
• "EFI" - The one you've downloaded from here.

If You want to also use iServices, you'll need to modify the "config.plist" file, located in EFI>OC>"config.plist", using the "ProperTree" editor.

After you've opened the file using "ProperTree", follow the dortania's guide on how to use GenSMBIOS and apply modifications.

• ProperTree
• GenSMBIOS