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#How to repair external hard drive mac disk utility mac os
#How to repair external hard drive mac disk utility password

Check the external hard drive in System Information. Reboot your Mac computer to recognize the external drive again. If a hard drive is acting up, Disk Utility’s First Aid function is the first thing you should try. Manually show external hard drive in Disk Utility. RELATED: How, When, and Why to Repair Disk Permissions on Your Mac. The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4, then APPLE SSD. 10 solutions to fix/repair an external hard drive not showing up in Disk Utility. 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.

#How to repair external hard drive mac disk utility password

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.

The Terminal will scan for errors and repair. Type this command: /sbin/fsckhfs -fy /dev/ partition number Press Enter. Then at the Mac Disk Utility interface, click 'Restore'. Then hit 'Erase' again and wait for the drive to remount on Mac.

#How to repair external hard drive mac disk utility mac os

Restart the Mac to enter single-user mode. At the drop-down list which has 'Format' options, choose Mac OS Extended (Journaled). If the button is dimmed and you can't click it, skip this step for the disk, container, or volume you selected. The computer will give you a corrupt partition number.How do I fix it and copy files from Mac to an external hard drive On. If there is no Run button, click the Repair Disk button instead. Why can't I copy files to an NTFS external hard drive on Mac The external hard drive is NTFS and showing as Read-Only on Mac.In this example, the last volume on the disk is Macintosh HD - Data.Ĭlick Run to begin checking the selected volume for errors.

For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.