Open dmg file

dmg file icon Did your computer fail to open dmg file? We explain what dmg files are and recommend software that we know can open your dmg files.

What is dmg file?

A dmg file extension is used for default disk image format in Mac OS X (macOS) that replaced the older IMG format. It is used much like ISO images on Windows platform.

dmg file description

The dmg file extension is associated with disk image files created for Mac OS X (macOS).

The DMG file format is used for mountable disk images, which can be opened (mounted) with the Finder a default file manager included in OS X (macOS).The dmg files can also be mounted in most popular emulation utilities.

The dmg file type is a replacement for the older IMG format used in Mac OS Classic and is not compatible with Mac OS 9 or earlier.

Apple DMG format is one of the most used format to install new applications to the Mac OS X (macOS).

By default, Apple Disk Image DMG file uses Universal Disk Image Format (UDIF) to store data, but it can use another file systems, like HFS, HFS+, FAT, UDF, or old New Disk Image Format (NDIF) compatible with Mac OS 9. This feature facilitates for example creation of hybrid optical media with multiple file systems for various platforms.

It can be protected by password (AES-128, or AES-256 encryption) as well as compressed by some compression formats (ADC, Zlib, bzip2).

DMG MIME type:

Software that will open dmg file

Apple Disk Utility

A disk mounting utility from Mac

Apple Finder

The default file manager in macOS


A Unix-based desktop operating system for Apple Mac computers

Mac OS X

Unix-based operating system for Apple Mac computers


Popular open source file archiver with a high compression ratio


App used to create Apple DMG disk images


A disk image converter for Microsoft Windows

Other dmg file extensions

dmg - Oracle binary format dump data

Files with dmg file extension can also be found as binary dumps created by Oracle programs. Should not be confused with the common Mac OS X (macOS) disk image that also shares the DMG extension.

What file extension actually is?

Simply put, file extensions are the characters after the dot in the file name, so for example filename.mp3 has file extension „mp3“. This helps Windows to identify which program should be used to open the file.

We can help you to open your file

Our database contains a huge list of different file extensions, usually with detailed description and programs that can be used to open or otherwise work with that particular file type.

Only original software

Every software listed in our database is verified and ve provide link to the developer or to the software own website, which should hopefuly be enough for you to download the most recent version of the program.