If you used Disk Utility from macOS Recovery, you can now restart your Mac: choose Apple menu  > Restart. The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4, then APPLE SSD. Before I installed OneDrive for backup my C drive was about 1/3 full. OneDrive copies everything on my separate D drive onto my C drive as well as the cloud. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself. My C drive is also almost full due to OneDrive. If only abc1 is displayed, then it is case sensitive (i.e.

If the ls command displays both files, abc1 and ABC2, then your drive is case insensitive (i.e. Enter the following commands: touch abc1 touch ABC2 ls a. However, if you need to regularly access. Most hard drives, except those with the largest capacity and internal hard drives with desktop mounts, tend to be small and light enough to carry in a laptop bag or pocket. Go Mobile with a Portable Hard Drive for Mac and PC. If you're asked for a password to unlock the disk, enter your administrator password.Īfter Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. Heres how to format a drive if you are planning to use it with a Mac. You can do a test in a shell: Open the Terminal. Thunderbolt is common in Mac hard drives and also an increasing number of PCs.If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected.If there is no Run button, click the Repair Disk button instead.MacBook, MacBook Air, and MacBook Pro models with USB-C ports require a USB-C to USB adapter (sold separately) to use Apple USB SuperDrive. In this example, the last volume on the disk is Macintosh HD - Data.Ĭlick Run to begin checking the selected volume for errors. The Apple USB SuperDrive is compatible with Mac models from 2008 and later that don't have a built-in optical drive. For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.

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