If Disk Utility can't repair external hard drive or Macintosh HD, you should do as the error message shows: back up as many of your files as possible before fixing the issue for data protection. Well then, what should you do to fix Macintosh HD, external hard drive or another disk that Disk Utility can't repair? Here are some solutions for you. But if the hard drive is beyond the repair scope of Disk Utility, for example, file system gets corrupted, the issue appears. Usually, this problem may not only happen on Macintosh HD but also on an external hard drive in Mac Mavericks, Yosemite, EI Capitan, or Sierra.Īctually, the above message won't show up in normal circumstances of disk errors. However, sometimes you may receive the error message 'Disk Utility stopped repairing 'Macintosh HD'/disk1s2/External HDD, etc. When certain disk problems happen, to repair this disk using Disk Utility will be a good choice.

These tasks include formatting, partitioning, erasing, cloning disks, repairing a damaged disk, etc. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.' forums.macrumorsĭisk Utility, developed by Apple, is a comprehensive system utility for performing disk and disk volume-related tasks on the Mac operating systems. Now when I run disk utility and click Repair Disk it says: 'Disk utility can't repair this disk. I might have accidentally disconnected the hard drive without ejecting it first. Help! Disk Utility Failed to Repair This Disk 'My external drive is a Samsung M2 Portable 3 Media, 500GB.

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