The icon depicts an internal hard drive within a generic file icon.
Filename extension
.dmg, .smi, .img
Internet media type
application/x-apple-diskimage
Uniform Type Identifier (UTI)
com.apple.disk-image
com.apple.disk-image-smi
Developed by
Apple Inc.
Type of format
Disk image
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 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 folder. Disk images have .dmg at the end of their names. To see the contents of a disk image, you must first open the disk image so it appears on the desktop or in a Finder window.
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A diskimage is a snapshot of a storage device's structure and data typically stored in one or more computer files on another storage device. Traditionally...
Disk Utility is a system utility for performing disk and disk volume-related tasks on the macOS operating system by Apple Inc. The functions currently...
A sparse image is a type of diskimage file used on macOS that grows in size as the user adds data to the image, taking up only as much disk space as...
+1⁄4-inch Disk II concept over the course of the Apple II series' lifetime: The Disk II, the Disk III, the DuoDisk, the Disk IIc, the UniDisk 5.25" and...
floppy disk or floppy diskette (casually referred to as a floppy, a diskette, or a disk) is a type of disk storage composed of a thin and flexible disk of...
formatted Apple II System Disk 4.0.2 - Apple II System Disk 4.0.2, with ProDOS 8 2.0.3 and the system utilities, as an 800K DiskCopy format imageApple Operating...
destination drive or to a diskimage. DiskimageDisk cloning Backup List of backup software List of data recovery software List of disk partitioning software...
Macintosh External Disk Drive is the original model in a series of external 3+1⁄2-inch floppy disk drives manufactured and sold by Apple Computer exclusively...
operating systems. Numerous diskimages of Apple II software are available free over the Internet for use with these emulators. AppleWin and MESS are among...
Disk partitioning or disk slicing is the creation of one or more regions on secondary storage, so that each region can be managed separately. These regions...
the automatic installation of Rosetta 2, the correct handling of the AppleDiskImage (.dmg file) containing the drag and drop installer can be confusing...
EXE to Shockwave DCR". "Dir format - reverseShockwave". "Virtual Hard DiskImage Format Specification". "Draco Bitstream Specification". google.github...
The volume can be located either on a physical disk, in various Applediskimage and sparse diskimage formats, or a raw file system dump. However, HFSExplorer...
ProFile (codenamed Pippin) is the first hard disk drive produced by Apple Computer, initially for use with the Apple III personal computer. The original model...
DiskImageMounter for mounting the images and Disk Utility for creating them. "Disk Copy 4.2" (DC42) is the common name used to refer to diskimages of...
stands for Dot Matrix Game .dmg, file extension for AppleDiskImage files, a file format developed by Apple and used by macOS DMG (cancer), aka diffuse midline...
archive) containing at least three AppleDiskImage files with one containing the root file system of the OS and two ram disks for restore and update. tvOS...
floppy disk drive. Graphics modes include 560x192 in black and white, and 280x192 with 16 colors or shades of gray. Unlike the Apple II, the Disk III controller...
possibly the CD-ROM. UW-SCSI hard disks are seldom an issue and Apple even released an U-SCSI (but narrow) hard disk installation kit for the ANS even...
use more modern sparse bundle diskimages which spread the data over 8 MB files (called bands) within a bundle. Apple refers to this original iteration...
Apple Software Restore or asr is a command line utility in Mac OS X used to apply a DMG diskimage to a selected partition or mount point on a file system...
& UDO) Which filesystems the application supports. Information which Diskimage formats an application supports. Support for Rainbow book standards: Red...
and MacOS. TestDisk handles non-partitioned and partitioned media. In particular, it recognizes the GUID Partition Table (GPT), Apple partition map, PC/Intel...
A floppy disk is a disk storage medium composed of a thin and flexible magnetic storage medium encased in a rectangular plastic carrier. It is read and...
affected by its high price, insufficient software, unreliable Apple FileWare floppy disks, and the imminent release of the cheaper and faster Macintosh...
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