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Apple Disk Image. The icon depicts an internal hard drive within a generic file icon. Apple [1] Disk Image is a disk image format commonly used by the macOS operating system. When opened, an Apple Disk Image is mounted as a volume within the Finder . An Apple Disk Image can be structured according to one of several proprietary disk image ...
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DMG, the official product code for the original Game Boy handheld video game system, which stands for Dot Matrix Game. .dmg, file extension for Apple Disk Image files, a file format developed by Apple and used by macOS. DMG (cancer), aka diffuse midline glioma, a highly aggressive brain tumor, mostly found in children.
A disk image contains all files, faithfully replicating all data, including file attributes and the file fragmentation state. For this reason, it is also used for backing up optical media ( CDs and DVDs, etc.), and allows the exact and efficient recovery after experimenting with modifications to a system or virtual machine.
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 ...
File format support "Disk Copy 4.2" (DC42) is the common name used to refer to disk images of floppy disks created by the 4.2 version of Disk Copy. DART is a variant that supports compression, and was initially handled by the DART (Disk Archive/Retrieval Tool) utility. Disk Copy 6.0 added support for the New Disk Image Format (NDIF).
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 ...
A sparse image is a type of disk image file used on macOS that grows in size as the user adds data to the image, taking up only as much disk space as stored in it. Encrypted sparse image files are used to secure a user's home directory by the FileVault feature in Mac OS X Snow Leopard and earlier. Sparse images can be created using Disk Utility .