first aid high sierra volume could not be unmounted

#FIRST AID MAC VOLUME COULD NOT BE UNMOUNTED USING LIVE MODE HOW TO# Launch Disk Utility, located at /Applications/Utilities.ĭisk Utility’s default settings use a sidebar that only displays storage volumes. Since you may need to use the First Aid tool on volumes as well as partitions, catalogs, and physical devices, it’s a good idea to change the sidebar settings to display all devices.

(The View button in Disk Utility’s toolbar will expand the sidebar to show all devices.)Ĭlick the View button in the Disk Utility toolbar and select Show All Devices from the popup menu, or select Show All Devices from the View menu. The sidebar will now display all devices, including the physical drive and any APFS containers it may have, as well as any APFS or HFS volumes associated with the physical drive. The organization of the devices is hierarchical, with the physical drive listed first, using the manufacturer’s name, or the model name or number, or both.

At the next level under the physical drive is the Container (APFS file system), followed by the volumes.

If this is an HFS-formatted drive, there won’t be any containers under the drive level, just volumes.Įach item can be selected and repaired using the First Aid tool. #FIRST AID MAC VOLUME COULD NOT BE UNMOUNTED USING LIVE MODE HOW TO#.

First aid high sierra volume could not be unmounted