6 Replies Latest reply: Feb 18, 2013 12:18 PM by Eric Root
JM1990 Level 1 Level 1 (5 points)

I need to reformat my Mac OS X partition for a clean install and when I boot into the recovery partition to do so I am unable to erase the partition.  Some times in disk utility it shows as greyed out (unmounted) and will not allow me to mount.  Then other times it will show mounted and I will be unable to unmount and erase.  Any body dealt with this before.  Help is much appreciated.



Mac OS X (10.7.3)