Apple Disk Image

• Apple Disk Image File
• Apple Disk Images
• Apple Disk Image Mounter

Try selecting the disk image icon rather than the unmounted volume icon (which is what the image above shows). At least in previous versions of Disk Utility, that shows info about the disk image file (.dmg). You can also right click on the disk image icon and choose Eject. Not sure if that still holds true for El Capitan or not. There are a half dozen Apple-II disk image formats and several tools for manipulating them. Scavenging the histories is a bit of work in itself leading to parameters that no longer exist and formats that are deprecated or superceded. A quick run down on common Formats: DSK (.dsk.do.po). 5.25' DOS 3.3 or Prodos format. Apple introduced a disk image format in the name of DMG file. DMG files are known as the proprietary disk image file for Apple that is used generally on Mac OS machines. Therefore, most users are in the habit of keeping image backup of their system data in the form of DMG files.

Disk Utility User Guide

You can restore a disk image to a disk. To do this, you first need to erase the disk. If the disk image has multiple partitions, you must restore each partition individually.

Restore a disk image with a single volume to a disk

1. In the Disk Utility app on your Mac, select the volume that you want to restore in the sidebar, then click the Restore button .

   This is the volume that is erased and becomes the exact copy.

2. Click the Restore pop-up menu, then choose the volume you want to copy.

   If you're restoring from a disk image, click the Image button, then navigate to that disk image.

3. Click Restore.

Apple Disk Image File

Restore a disk image with multiple volumes to a disk

Apple Disk Images

To restore a disk image with multiple volumes to a disk, you must partition the destination disk, then restore each volume individually.

Apple Disk Image Mounter

1. In the Finder on your Mac, double-click the disk image to open it.

   Video mixing software, free download. The disk image's volumes appear as disks in the Finder.

2. In the Disk Utility app, select the disk in the sidebar, click the Partition button , then partition the destination disk.

   The destination 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. See Partition a physical disk in Disk Utility on Mac.

3. In the sidebar, select the volume that you want to restore, then click the Restore button .

   This is the volume that is erased and becomes the exact copy.

4. Do one of the following:

   • Restore from a volume: Click the 'Restore from' pop-up menu, then choose the volume you want to copy.

   • Restore from a disk image: Click Image, choose the disk image you want to copy, then click Open.

5. Click Restore.

6. Repeat steps 3–5 for each remaining partition.

See alsoCreate a disk image using Disk Utility on MacAdd a checksum to a disk image using Disk Utility on MacVerify that a disk image's data isn't corrupted using Disk Utility on Mac