Repairing EFI On Macbook

[Gizmo22]

Debating purchasing a used Macbook that "has a screwed up EFI bootloader." The individual claims to have "messed up EFI" by installing other operating systems on the drive.

I am not terribly fluent with EFI versus older bootloaders as I am recently coming from a Windows system. Nevertheless, is anything needed other than a simple reformat, or is EFI embedded in CMOS circuitry or elsewhere?

 

[Quad5Ny]

Just installing another OS will not do anything to the UEFI, the seller sounds like he doesn't know what he's is taking about.

Wiping the Hard drive and reinstalling OS X will probably be all that's needed.

 

[ppc_michael]

Check out rEFIt, an EFI boot menu that you can boot from a CD or copy it to your Mac OS X hard drive.

 

[Nermal]

You might also be able to do something with the Firmware Restoration CD.

 

[Intell]

Just installing another OS will not do anything to the UEFI, the seller sounds like he doesn't know what he's is taking about.

Wiping the Hard drive and reinstalling OS X will probably be all that's needed.

The quoted answer above is correct. Just reinstall Mac OS X and it'll work just fine.