Opening a DMG File

DMG	File extension: DMG
	File type:	Disk Copy Disk Image File

What is a DMG file

The DMG file type is primarily associated with Macintosh OS X by Apple Inc. On the Macintosh, these files are treated like a real disk. They can be created with Disk Copy, burnt to CD or mounted as a normal volume. If you have a .DMG file on a Windows PC it's likely you have a Macintosh file and you won't be able to use what is in it. Some sites distribute for the PC in an .EXE file and for the Mac in a .DMG file; make certain you have the version designed for your system. On a Windows PC the dmg2img program will convert a .DMG file to a standard (hfsplus) image disk file. On Windows, a fairly complete filesystem driver for HFS+ exists as a commercial software package called MacDrive. Note: You have to run the dmg2img program at a command prompt. DMGs can be password-protected and, if so, may not be mountable by some software. The DMG file also comes in different formats: HFS, HFS+, UFS, ProDOS, Linux, and Fat32 and so may also require special mounting software to account for the format. IsoBuster can interpret these files directly as can other programs such as UltraISO. The program TransMac, by Acute Systems, can both open and create DMG files on a PC.

How to open a DMG file

You need a suitable software like Macintosh OS X to open a DMG file. Without proper software you will receive a Windows message "How do you want to open this file?" (Windows 10) or "Windows cannot open this file" (Windows 7) or a similar Mac/iPhone/Android alert. If you cannot open your DMG file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application.

Programs that open and convert DMG files:

Macintosh OS X by Apple Inc.
See the previous paragraphs to learn more about the main application.
Oracle (Binary Format Dump File) by Oracle
This file type is used by the ORACLE Export utility and Import utility. Related links: Transferring with Export and Import

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Technical Data for DMG File Extension

Mime type:

application/x-apple-diskimage

Identifier:

Hex: 78, ASCII: x (provided by TrID database)

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: DMGFileImage
EXEFile: %ProgramFiles%\Smart Projects\IsoBuster\IsoBuster.exe %1

ProgramID: IsoBuster.dmg
EXEFile: %ProgramFiles%\Smart Projects\IsoBuster\IsoBuster.exe %1

ProgramID: UltraISO
EXEFile: %ProgramFiles%\UltraISO\UltraISO.exe

ProgramID: IsoBuster.dmg
EXEFile: %ProgramFiles%\IsoBuster\IsoBuster.exe

ProgramID: MagicISO.Document
EXEFile: %ProgramFiles%\MagicISO\MagicISO.exe

ProgramID: DMGFileImage
EXEFile: %ProgramFiles%\_CDvD\IsoBuster\IsoBuster.exe

ProgramID: 7-Zip.dmg
EXEFile: %ProgramFiles%\7-Zip\7zFM.exe

Show all 7 listings To Top

a DMG Disk Copy Disk Image File is a special file format by Apple Inc. and should only be edited and saved with the appropriate software.

How to solve problems with DMG files

Associate the DMG file extension with the correct application. On , right click or tap the file.
Update your software that should actually open Disk Copy Disk Image Files. Because only the current version supports the latest DMG file format. Search, therefore, e.g. on the Apple Inc. manufacturer website after an available Macintosh OS X update.
To make sure that your DMG file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.