OS X Mountain Lion: If a disk can’t be repaired
This article has been archived and is no longer updated by Apple.
If you see a message saying OS X can’t repair a disk, you may need to reformat it or replace it.
- Back up as much of your data as possible, reformat your disk by partitioning it, and then restore your backed up data.
- If you continue to have problems with your disk, it may be physically damaged, and you may need to replace it.
Find out how to service or repair your Mac
Last Modified: Sep 4, 2015