Comment 76 for bug 774089

I've now ended up completely restoring my MBP 5,5 (in efforts to get it up and running again before I was able to find the re-install firmware advice)... My question to those involved is this: If I try re-installing Natty, will simply re-re-installing the firmware file bring everything to life, leaving my Mac data intact? Alternatively, is there a way to install Natty without bricking the EFI in the first place?