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Developer(s) Apple Computer
Stable release 10.8 / June 27, 2012; 2 years ago (2012-06-27)
Operating system Mac OS X
Type Disk image emulator
Website www.apple.com

DiskImageMounter is the utility that handles mounting disk volume images in Mac OS X, starting with version 10.3. DiskImageMounter works by either launching a daemon to handle the disk image or by contacting a running dæmon and have it mount the disk.

Like BOMArchiveHelper, DiskImageMounter has no GUI when double-clicked; in fact, doing so does nothing. The only GUI the program ever displays is a window with a progress bar and mount options (cancel or skip verification) or an error report if it could not mount the image. It is found in /System/Library/CoreServices/DiskImageMounter.app.

Image formats supported[edit]

DiskImageMounter supports a variety of disk image file types:[1]

  • Apple Disk Image (.dmg, com.apple.disk-image)
  • UDIF disk images (.udif, com.apple.disk-image-udif); UDIF segment (.devs, .dmgpart, com.apple.disk-image-udif-segment)
  • NDIF disk image (.ndif, .img, com.apple.disk-image-ndif); NDIF disk image segment (.imgpart, com.apple.disk-image-ndif-segment)
  • self mounting image (.smi, com.apple.disk-image-smi)
  • DVD/CD-R master image (.toast, .dvdr, .cdr, com.apple.disk-image-cdr, com.roxio.disk-image-toast)
  • disk image segment (dmgpart)[1]
  • Disk Copy 4.2 disk image (.dc42, .diskcopy42, com.apple.disk-image-dc42)
  • DART disk image (.dart, com.apple.disk-image-dart)
  • raw disk image (OSTypes: devr, hdrv, DDim, com.apple.disk-image-raw)
  • PC drive container (OSTypes: OPCD, com.apple.disk-image-pc)
  • ISO image (.iso, public.iso-image)
  • sparse disk image (.sparseimage, com.apple.disk-image-sparse, .sparsebundle)


  1. ^ a b /System/Library/CoreServices/DiskImageMounter.app/Contents/Info.plist

See also[edit]