Mac format disk from terminal

This USB drive will become the third disk. This example uses a Mac that has two disks, and the third one is the USB drive. Note : disk3 is the one in which I want to create two FAT32 partitions. Note : disk3 was formatted as NTFS. You can first use Mac Disk Utility to erase the disk, reformat it using right format.

How to Verify and Repair a Disk From the OS X Command Line

Note : disk3 currently cannot be partitioned. See the icon being grayed out. At the end of the exercise, you will be able to partition it. Now, you will be able to partition the disk using Disk Utility. If you get an error like MediaKit reports not enough space on device for requested operation.

How to format a USB external disk for Mac OSX using Disk Utility | Coolest Guides on the Planet

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This includes working with unformatted drives as well as unformatted USB flash drives. Disk Utility lets you pick which display mode to work in: Volumes only, All Devices, or only a selected drive.

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You can switch between them at any time, and Disk Utility will update the display immediately; no need to close and reopen the Disk Utility app or restart your Mac. To select this option:. Show All Devices This setting will display all storage devices connected directly to your Mac. In addition to each device being displayed, a hierarchical listing will show how each device is organized, i.

How to Format a Drive on a Mac

Absent from the hierarchical view will be any of the items Apple has decided to hide from the end user, such as EFI volumes and Recovery volumes. From the Disk Utility toolbar, click the View button, and then select the Show All Devices item from the dropdown menu.


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The Sidebar will change to display all locally connected devices, presented in a hierarchical view starting with the physical device, than any containers and volumes the device may have been partitioned into. Hide the Sidebar For the ultimate in simplicity, you can choose to hide the sidebar and remove any listings of devices or volumes from view. From the Disk Utility toolbar, click the View button and select the Hide Sidebar item in the dropdown menu.

The sidebar will close, and the last selected item in the sidebar will become the only item listed in the Disk Utility window. This will allow you to select the correct device from the sidebar list and perform the necessary tasks.

You can find out more about formatting and partitioning a device in the following Rocket Yard Guides:. Erasing or Repairing a Volume If all you need to do is erase an existing volume or attempt to repair a volume, you can use either the Show Only Volumes or Show All Devices view.

How to erase a disk

If you need instructions for repairing a volume, check out the following Rocket Yard Guide:. At the Terminal prompt , enter the following:. Terminal will display a list of all storage devices currently connected directly to your Mac.

Each device Terminal finds will be listed by the device identifier; usually disk0, disk1, etc. Where disk is the disk identifier of the volume you discovered using the diskutil list command. We would enter the following at the Terminal prompt:. However, the APFS volume was successfully mounted; you just need to view the mount point directly from within the Finder. You can view this directory by doing the following:. Why Mount Volumes with Terminal The primary reason for using Terminal to examine storage devices connected to your Mac, as well as to mount volumes that for some reason failed to mount automatically, is to try to correct issues you may be having with devices or volumes.

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The exception is those volumes Apple has marked as hidden.