Quick Answer To securely erase a Mac drive in Disk Utility, open Disk Utility, choose View > Show All Devices, select the correct physical drive or volume, click Erase, choose a format, and confirm. For an internal startup drive, you must first start the Mac in macOS Recovery because macOS cannot erase the disk it … Read more
A disk or volume may be connected to your Mac but unavailable in Finder. In that case, you may need to mount it in Disk Utility. When you are finished using an external disk, you should unmount or eject it before disconnecting it to reduce the risk of data loss. Quick Answer To mount a … Read more
You can repair many common file-system problems on a Mac with Disk Utility’s First Aid feature. Open Disk Utility, select the volume you want to check, and choose First Aid. For the most thorough check, run First Aid on the volume, its container, and finally the physical disk. If the startup disk cannot be repaired … Read more