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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. Disk Utility Can't Repair This Disk FAQ.Recover Data from Formatted Hard Drive on Mac.Fix Disk Utility Can't Repair This Disk.Help! Disk Utility Failed to Repair This Disk.In its place would be "disk0s2." It is this indented entry that you want to erase.Are there some disk problems on your Mac? Want to use Disk Utility to fix them but receive an error message "Disk Utility can't repair this disk"? This post will walk you through how to quick and effectively fix this issue. You might see that it is displayed on the list as: To be sure you do this right, please observe that the drive may appear in the list as ghosted because it is unmounted. Use the device reference in this next command. It will appear similar but not the same as this: /dev/disk0s2. In the output, you should find your Fusion drive listed. At the prompt paste these lines individually pressing RETURN at the end of each line. If that doesn't work then quit Disk Utility and open Terminal from the Utilities' menu. After doing that click on the Unmount button in the toolbar to see if the disk disappears from the Desktop.

Try repairing the disk in Disk Utility using First Aid.