原帖由： mayer ,
This could be a number of things from a failing logic board to a failing hard drive to a corrupt system. So we need to take the shotgun approach and try several things. First I would start up from my system installation disk, go to the second page pull down menu to Utilities > Disk Utility select the hard drive on the left and see if you can repair the drive and the permissions. That failing come back and we'll reset the SMC and zap the PRAM.