Disk utility First Aid freezes; Mohave 10.14.13
disc First Aid in Disk utlity freezes
iMac 27", 10.14
Question marked as
disc First Aid in Disk utlity freezes
Mojave 10.14.3
If you ran DiskUtility from your mounted drive / or from terminal on the mounted drive this is a possibility.
You can Force quit if necessary holding the power button for an extended amount say ~8-10 sec.
Boot into Recovery (Command R) and from the dropdown menu: Utilities> Disk Utility> run the First Aid on your Macintosh HD. If errors are found and repaired, run again until no errors reported.
Recovery http://support.apple.com/kb/HT4718