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• Insert the USB drive.

• Open Terminal.

• Find the location of the USB drive:

  • Type in the following command to list all the drives. This should show a listing of the different drives.

    Code Block
    diskutil list

  • Find your USB drive in the list (it will be something like /dev/diskX (external, physical) where X is the number assigned to your USB drive. Look at the size of the drive to verify that it is the correct drive.

• Before erasing, you may need to unmount the drive. Replace X with the correct disk number (e.g., /dev/disk2).

  Code Block
  diskutil unmountDisk /dev/diskX

• Erase the USB drive:

  • Click the Erase button at the top of the window.

  • Type a label for the drive into the Name field.

  • In the Format field, select MS-DOS (FAT).

  • Click the Erase button.

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