![]() ![]() ![]() If you really want to see everything that macOS hides from you, launch Terminal & type diskutil list - you'll see 'real' disks & volumes, & also synthesised ones which are virtual but necessary for the smooth operation of the system.įor example - /dev/disk0 (internal, physical):Ģ: Apple_APFS Container disk1 1000.0 GB disk0s2Ġ: APFS Container Scheme - +1000.0 GB disk1ġ: APFS Volume Macintosh HD 585.5 GB disk1s1ĭespite all this, all you will see in Disk Utility is either just Macintosh HD, or your drive's physical name with & Macintosh HD inside that. Disk Utility, a built-in disk manager on Mac that can be accessed with or without your Mac booting up, can repair, restore, partition, and erase internal disks and external storage devices. If you don't need or want to see any of this 'under the hood' detail, you can set Disk Utility to only show Volumes, not all devices.Ĭmd ⌘ 1 or View Menu > Show Only Volumes will do this for you. Also, you can run Disk Utility First Aid to repair disk. ![]() You can use the Erase feature in Disk Utility menu to format Mac startup disk. Disk Utility in macOS Recovery is a tool to verify, repair and erase connected disks including Macs internal SSD. This will entail actually making 4 partitions, 3 of which will be nominally hidden from you. The thumbnail shows which operating system will be installed on your Mac. You should back up your Mac before trying to erase or reformat it. Recovery Mode is a special partition on your Mac you can use to restore from a backup, reinstall macOS, get online support, or erase your startup disk. If you format your main internal disk from Recovery, Disk Utility will actually set the drive up ready to accept a new macOS. It’s not usually possible to erase the startup disk because your Mac is using it to run macOS.
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