DMG File Extension

DMG file icon
Mac OS X Disk Image
  • Developer
    Apple
  • Popularity
    3.7 (8 votes)

What is DMG file?

Files with the DMG extension are bootable disc images, supported in Mac OS X systems. This files are often encountered with installers of software downloaded from the internet. Such files are opened with the Apple Disk Utility application, which is used for mounting images in Apple devices. After being mounted, the image of a file is displayed in the standard file manager – Finder, as a new volume.

Additional information

DMG images may comprise of different types of file systems. Theoretically, it is possible to create also hybrid images, containing multiple file systems. Using Apple Disk Utility we can use an image as source for CDs or DVDs being recorded.

In some situations, DMG files may contain installation software necessary for installation of the programs contained within them, thus they do not require using any additional tools.

DMG files in different operating systems

In Mac OS X systems, the DMG files have substituted files stored in the IMG format in the previous version of the system: Mac OS Classic. Although DMG files are by default designed for devices running on Mac OS, there are tools which enable to converse them into formats supported by Windows. However, not every DMG image can be properly converted into format supported by Windows – furthermore, there is no guarantee, the image will be possible to operate on properly.

Conversion of a DMG file

When you install one of the applications from the list of programs that you found here, you should be able to open or edit the file with the DMG extension without any issue. However, if you still have problems with this, you may use the option of DMG file conversion to a different format.

File Conversions from DMG extension to a different format
File conversions from other format to DMG file

We hope we helped you solve the problem with the DMG file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the DMG file (apart from the lack of the proper application installed).

First - the DMG file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the DMG file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the DMG file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the DMG file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the DMG file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on DMG file.

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