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An Apple Disk Image can be structured according to one of several proprietary disk image formats, including the Universal Disk Image Format (UDIF) from Mac OS X and the New Disk Image Format (NDIF) from Mac OS 9. An Apple disk image file's name usually has ".dmg" as its extension. A disk image is a compressed copy of the contents of a disk or ...
Apple Software Restore. Apple Software Restore or asr is a command line utility in Mac OS X used to apply a DMG disk image to a selected partition or mount point on a file system. It is often used for cloning large numbers of Macintosh computers. Apple Software Restore can read an image locally or from a server via HTTP or its own multicast asr ...
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The functions currently supported by Disk Utility include: [1] Creation, conversion, backup, compression, and encryption of logical volume images from a wide range of formats read by Disk Utility to .dmg or, for CD/DVD images, .cdr. Mounting, unmounting and ejecting disk volumes (including both hard disks, removable media, and disk volume ...
HFS Plus or HFS+ (also known as Mac OS Extended or HFS Extended) is a journaling file system developed by Apple Inc. It replaced the Hierarchical File System (HFS) as the primary file system of Apple computers with the 1998 release of Mac OS 8.1. HFS+ continued as the primary Mac OS X file system until it was itself replaced with the Apple File ...
[1] [5] Versions of Disk Copy in Mac OS X added support for the newer Universal Disk Format (UDIF) image format, introduced with DMG files in Mac OS X. Although the last official public release of Disk Copy for Mac OS 9 was version 6.3.3, there was to be a version 6.5 that supported OS X's UDIF image format. But because Apple had stopped ...
Apple File System (APFS) replaces HFS Plus as the default file system in macOS for the first time with High Sierra. [4] It supports 64‑bit inode numbers, is designed for flash memory, and is designed to speed up common tasks like duplicating a file and finding the size of a folder's contents. It also has built‑in encryption, crash‑safe ...
Bold text== Incompatibilities in dmg introduced across Mac OS X 10.1-5 generations == Someone knowledgable needs to add the unpleasant reality of how a dmg created on Intel-Mac fails to mount on 10.1 and 10.2 systems, unless steps are taken to ensure that it does, which gets neglected routinely these days.