This partition stores the files necessary to boot the operating system, including driver files, otherwise known as kexts, also known as kernel extensions. Often times, you have to access the EFI partition to put these kexts in the right place so they load when you boot the system, most commonly on systems using the Clover Bootloader. This can result in the clones getting a generic name, 'efi boot.' All it means is that the volume is a proper startup volume. 'EFI' means 'Extensible Firmware Interface' which is the type of firmware interface used in Intel Mac boot ROMs. User KJK555 offers the following fix.

Mac Os Remove Efi Boot

How exactly do you make these clones and are all of these 'bootable options' made by cloning?
Some cloning software does not set the permissions on the destination drive properly, while other cloning software does not require you to erase the destination drive first, and still other cloning software may not provide a valid disk name. This can result in the clones getting a generic name, 'efi boot.' All it means is that the volume is a proper startup volume. 'EFI' means 'Extensible Firmware Interface' which is the type of firmware interface used in Intel Mac boot ROMs.
User KJK555 offers the following fix:
To fix:

Open Terminal.app,
at the prompt type:
sudo bless --folder /System/Library/Coreservices --bootefi
(press return, enter your admin password, press return again)

I do not know if you must first boot from each drive in order to apply the fix to that drive or if there is another way, but I'm sure that if you first boot from each drive and apply the fix then the problem should be solved ...... I think.

Mac Os X Efi Boot

Aug 24, 2010 2:09 PM

Mac Os Efi Boot