Open DMG File

DMG Extractor

DMG Extractor is a software which as follows from its name allows opening and extracting DMG files. Free version of DMG Extractor only allows to extract one file at a time which may make process of retrieving files from DMG cumbersome. Thus 7-Zip is still our first choice for DMG file extraction. But if 7-Zip is unable to open your DMG file or you just want to extract one file from DMG then you can try DMG Extractor since it supports many different DMG formats.

In order to open DMG file in DMG extractor click on Open button in the toolbar. Select the file you want to open and click on Open button in “Open Dmg file” dialog.

After that you will see contents of the DMG file in DMG Extractor main window.

Select files that you want to extract and click on Extract button in the toolbar. DMG Extractor will ask you to select where you want your files to be extracted and after confirming that your files will be extracted to selected location.

Using hdiutil

Hdiutil is a helpful command line utility which allows to manipulate disk images. With hdiutil you can attach, detach, verify, burn and perform other actions with disk images.

Below are several examples of using hdiutil.

To attach (mount) example.dmg disk image type:

hdiutil mount example.dmg

When you mount disk image it will appear under /Volumes folder. If you want to mount disk image under a different path your can either use -mountroot or -mountpath options like in example below:

hdiutil mount -mountpath /Volumes/folder example.dmg

Unmounting disk image is similarly done by the following command:

hdiutil unmount /Volumes/example

You can also burn an image on CD or DVD by running:

hdiutil burn example.dmg

To create a disk image with hdiutil you can use following command:

hdiutil create -encryption -size 10m -volname encdata test.dmg -fs HFS+J

If you need to create a disk image from specific folder type:

hdiutil create -volname DiskImageName -srcfolder /path/to/the/folder -ov -format UDZO example.dmg