How to Make a Bootable Disk DMG

Written by j.s. copper
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How to Make a Bootable Disk DMG
(Jeffrey Hamilton/Digital Vision/Getty Images)

A DMG file is a disk image file for the Mac OS X operating system. The disk image is a digital copy of a physical disk. If the DMG contains bootable software, you will need to format the disk drive before the disk will actually boot your system. The process is extremely simple using Mac OS X software.

Skill level:
Moderately Easy

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Things you need

  • USB drive

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Instructions

  1. 1

    Insert the USB drive into the computer via a USB port.

  2. 2

    Open "Disk Utility."

  3. 3

    Select the USB drive within Disk Utility, click "Partition." Click "Options." Select "GUID Partition Table" (or "Apple Boot Record" if using an older PowerPC model), click "OK." Set the partition scheme to one partition. Click "Apply."

  4. 4

    Click "Restore." Click "Browse" next to "Source" and open the DMG image. Drag the USB drive to the "Destination" box. Click "Restore" to copy the DMG to the drive. Once complete, the drive will be capable of booting your Apple computer.

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