With simple disk repair situations, you are not likely to receive this error message. If it’s the internal hard drive, you may also see information saying “The volume Macintosh HD could not be repaired.” What are the possible causes of the Disk Utility can't repair this disk error? This error can occur with internal hard drive, external hard drive, SD card, USB flash drive, etc. When you try to repair your disk on Mac using Disk Utility, if the First Aid fails, you may receive an error message telling you that Disk Utility stopped repairing Macintosh HD.
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About macOS 'Disk Utility Can't Repair This Disk'.
