
Disk images can be mounted on a computer just like a physical cd.DMG files can be customized according to the manufacturer’s wish so that the installers look pleasing when people download the files for installing software.Instead of sending more than one file over the internet, the creators have to send a single dmg disk image which contains all the required installation files of the software that can be simply dragged and dropped into the applications folder of Mac to install them.This makes the software supplied inside the dmg secure from viruses as no one can alter the file after it is created. DMG Images are read only which ensures that the files inside the installer are not altered with.

Some tools can also convert DMG Files to windows-recognizable image files like. However, using some image softwares like Daemon tools on windows, we can mount disk images of DMG type on windows too.

Disk Image Files are only meant to be used in Mac based systems and not on the Windows operating systems.

The newer disk image file was used in place of the original IMG or image file which was used in earlier versions of mac that are classic mac operating systems.
