Home : File Types : DMG File

.DMG File Extension

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File TypeMac OS X Disk Image

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Rare Uncommon Average Common Very Common
CategoryDisk Image Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a DMG file?

A DMG file is a mountable disk image created in Mac OS X. It contains raw block data typically compressed and sometimes encrypted. The file is commonly used for OS X software installers that are downloaded from the Internet and mounts a virtual disk on the desktop when opened.

More Information

The DMG format replaces the older .IMG file format used in Mac OS Classic. DMG disk images can be opened using the Apple Disk Utility that is bundled with Mac OS X on Apple computers.

DMG files are Mac-specific and are not intended for use in Windows. However, Windows Daemon Tools may be able to mount virtual drives from some DMG image files. Other utilities may also be able to convert DMG files to a format that can be recognized by Windows.

Programs that open DMG files
Microsoft Windows LogoWindows
Acute Systems TransMac
Catacombae HFSExplorer
Reincubate DMG Extractor
Mac OS X LogoMac
Apple Disk Utility
Roxio Toast 14
Incredible Bee Archiver
Catacombae HFSExplorer
Linux LogoLinux
Catacombae HFSExplorer
Updated 4/15/2016