As you are at the moment using a Windows 7 running PC, you cannot make use of the DMG file to install the software it holds onto instead, you can glance through its contents in three different ways. The DMG file has every other type of installation file that is needed to install a software program into Mac OS running computers. The DMG files have the exact options an ISO file does in Windows. The DMG files are disk image files that can be used to install software programs to Mac OS X running iMac or MacBook. Before starting with the actual process to open and view the DMG file in Windows 7 installed computer, you need to understand about the DMG file type. Alternatively, if you are using a Windows 7 operating system installed computer, and found a DMG type of file present within the Windows system, then you can still open DMG file to check what it holds onto. If you are an ardent Apple Computer system user, then you might have heard about DMG files and the installation possibilities it holds onto in the first place.