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.DMG File Extension

File TypeMac OS X Disk Image

DeveloperApple
Popularity
4.3 (708 Votes)
CategoryDisk Image Files
FormatBinary

Binary

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. DMG files are 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.

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Programs that open DMG files
Updated 10/18/2016

About DMG Files

Our goal is to help you understand what a file with a *.dmg suffix is and how to open it.

The Mac OS X Disk Image file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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