It asked to repair Disk, I select that and it shows Verify and Repair volume "disk0s2" Checking file system Checking Journaled HFS Plus volume. Checking extents overflow file. Checking catalog file. The volume Macintosh HD could not be verified completely. Volume repair complete. Updating boot support partitions for the volume as required. Error: Disk Utility can't repair this disk... disk, and restore your backed-up files. -I try to use Time machine but it does not show any dates to restore to. Any advice? I'm about to have a nervous breakdown, lots of work and not even backed up.