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Not to be confused with proprietary Disk Image formats used by Apple Inc.

A disk image is a computer file containing the complete and exact contents of a storage medium, such as a floppy disk, CD-ROM, DVD-ROM, etc. These can be used for the purposes of backup, bootable drive cloning, or distribution over a network.[1]

Usage[]

Disk images are often used to install downloadable software and operating system updates onto computers, a task formerly done with physical disks. The .iso extension is often used to identify disk image formats based on the ISO 9660 standard defined by the International Organization for Standardization (ISO).[1] Writable disk images can be mounted and accessed like a physical disk on supported operating systems. These can be managed in Mac OS X and macOS through Disk Utility, which also utilizes Apple's proprietary Disk Image (DMG) format.[2]

References[]

  1. 1.0 1.1 ISO image, Computer Hope. 2017-04-26.
  2. Disk Utility, Open DMG File. 2018.

External links[]

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