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diskutil — Utility to manage local disks and volumes. Some subcommands such as `partitiondisk` have their own u

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandlocalanddiskutilclimanagedisksutility

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Problem

How to use the diskutil command: Utility to manage local disks and volumes. Some subcommands such as partitiondisk have their own usage documentation. More information: <https://keith.github.io/xcode-man-pages/diskutil.8.html>.

Solution

diskutil — Utility to manage local disks and volumes. Some subcommands such as partitiondisk have their own usage documentation. More information: <https://keith.github.io/xcode-man-pages/diskutil.8.html>.

List all currently available disks, partitions, and mounted volumes:

diskutil list

Repair the filesystem data structures of a volume:

diskutil repairVolume {{/dev/disk}}

Unmount a volume:

diskutil unmountDisk {{/dev/disk}}

Eject a CD/DVD (unmount first):

diskutil eject {{/dev/diskX}}

Code Snippets

List all currently available disks, partitions, and mounted volumes

diskutil list

Repair the filesystem data structures of a volume

diskutil repairVolume {{/dev/disk}}

Unmount a volume

diskutil unmountDisk {{/dev/disk}}

Eject a CD/DVD (unmount first)

diskutil eject {{/dev/diskX}}

Context

tldr-pages: osx/diskutil

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