Disk Utility 12.x: Restore a disk image to a disk

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Restore a disk image to a disk using Disk Utility

A disk image is a file that contains other files and folders. For example, it could contain a backup of a disk or a collection of files someone wants to share with you. To access a disk image’s contents, double-click it. The Finder mounts a disk on your desktop with the image’s contents, which you can access like any other disk.

You can also copy, or “restore,” the contents of a disk image to a disk. You can erase a disk and replace it with the disk image’s contents, or you can leave the data on the disk and add the disk image’s contents to it.

Restore a disk image with a single partition to a disk

  1. Open Disk Utility, in the Utilities folder in Launchpad.
  2. Select a disk and click Restore.
  3. Drag the disk image to the Source field.

    You can drag the disk image from the list at left, the Finder, or a web browser.

  4. Drag the disk that will hold the contents of the disk image to the Destination field.
  5. If you want to erase the disk before copying to it or use the disk to start up a computer, select “Erase destination.”

    If you want to add the disk image’s contents to the destination disk without erasing it, deselect “Erase destination.”

  6. Click the Restore button.

Restore a disk image with multiple partitions to a disk

To restore a disk image with multiple partitions to a disk, you must partition the destination disk, and restore each partition individually.

  1. Open the disk image by double-clicking it in the Finder.

    The disk image’s partitions appear as disks in the Finder.

  2. Open Disk Utility, in the Utilities folder in Launchpad.
  3. Click Partition, and then partition the destination disk.

    The disk must have as many partitions as the disk image, and each of the disk’s partitions must be at least as large as the corresponding partition in the disk image.

    Partition a disk

  4. Click Restore, and then drag a disk image partition from the list at the left to the Source field.
  5. Drag the corresponding disk partition from the list at the left to the Destination field.
  6. Click Restore.
  7. Repeat steps 4–6 for each remaining partition.
Published Date: Sep 3, 2015
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