The DMG file can be burned to a CD or mount as a normal volume on Macintosh computers. It is an exact copy of a hard disk or compact disk. DMG file is the disc image file used by MAC OSX.
Using it, you can directly view the contents of an DMG file as well as edit the contents of the file in several different ways. Part 2: View a DMG File on Windows with UUByte DMG Editor The second app we recommend in here is UUByte DMG Editor, which is a robust application is available for both Windows and Mac OS X systems.