Because the ISO file retained complete data information of the compact disc (including compact disc boot information), you were allowed the convenience to use commonly used CD/DVD burning software (for example Nero-Burning ROM ) to record the disc with your CD-R/RW or DVD-R/RW over and over forever, it can also be used directly through Virtual CD/DVD-ROM drive software (for example Daemon-Tools ).

Then you can feel free to delete the original DMG file: you don’t need it anymore.Īlong with the large capacity hard disk popularity, people were already used to copying compact discs to CD/DVD image files, generally used is the famous ISO 9660 international standards format, therefore CD/DVD image files are called ISO files. When you’re done installing the application, it’s a good idea to unmount the DMG in Finder when you’re done installing: just click the “Eject” arrow.

DMG files are mounted by your system, like a sort of virtual hard drive.