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.DMG File Extension

File TypeMac OS X Disk Image

4.3 (3000 Votes)
CategoryDisk Image Files

What is a DMG file?

A DMG file is a mountable disk image created in macOS. It contains raw block data typically compressed and sometimes encrypted. DMG files are commonly used for macOS software installers that are downloaded from the Internet, which mount 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 macOS 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.

Open and view .DMG files with File Viewer Plus.
Programs that open DMG files
Updated 3/8/2019

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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