A friend of mine brought me his MacBook to see if I could bring it back to life, and I have to say I failed. This is what happens. On booting, the Apple icon comes up, and then the spinning wheel starts up . . . and keeps going and going and going. My friend says he's let it run for hours, and it doesn't get beyond the spinning wheel.
This is what I did. First, I reset the P-RAM. No joy.
Then I booted into single user and ran fsck. No joy.
Then I connected to my laptop via T-mode and ran DiskWarrior. No joy.
Then I did the same and ran TechToolsPro, fixing the volume structures. No joy.
A SMART check showed the HD was OK.
I then booted the MB from the TechToolsPro disk--and it booted fine, and ran the RAM check, which showed that the RAM was ok too. Still no joy.
I can't figure it out. The software checks say things are OK, and the hardware checks say things are OK.
My friend has left, but I'm wondering if there's something else he could do.