Disk Utility can fix certain disk problems. But we may get the message "Error: Disk Utility can't repair this disk" when we repair external hard drive on Mac.
When this happens, we are eager to know how we can repair external hard drive. Fortunately, here's the solution to repair external hard drive on Mac when Disk Utility can't repair it.
When Disk Utility can't repair external hard drive, that means external hard drive not mounted or external hard drive is not readable, etc. and we can do nothing but to reformat the drive in most cases. But there may be important data in external hard drive and reformatting will make us lose all data in it. In this situation, we have to recover data from the external hard drive on Mac, and then repair it by reformatting.
1st Step: Recover data from external hard drive
For data recovery, iBoysoft Mac Data Recovery is highly recommended to recover data from corrupted external hard drive on Mac.iBoysoft Mac Data Recovery is a professional Mac data recovery software that can recover lost documents, photos, videos, music, etc. from Mac hard drive, external hard drive, USB drive, SD card, memory card and other storage devices on Mac, no matter those drives are unmountable, unreadable, formatted, etc.
Instruction to recover data from corrupted external hard drive on Mac
2nd Step: Repair external hard drive on Mac
After data recovery from external hard drive, we can repair the external hard drive on Mac by reformatting it with Disk Utility.
Step 1: Launch Disk Utility from Utilities.
Step 2: Select the corrupted external hard drive.
Step 3: Select Erase function, complete the related information (name, format, scheme), then apply.
After finishing those steps successfully, we can repair external hard drive on Mac without data loss when Disk Utility can't repair external hard drive.
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