These files are often used by software installers that download applications from the Internet to a user's computer. dmg files may be encrypted in addition to being compressed, for added file security. They often contain raw blocks of data that are usually compressed for easier file management. These files can be created with Disk Copy, burned to a CD or even mounted as a normal volume on Macintosh computers. What is a DMG file?ĭMG files are files that are treated like actual hard disks by the Macintosh OS X operating system. Did your computer fail to open a DMG file? We explain what DMG files are and recommend software that we know can open or convert your DMG files. If you don't want to permanently replace your existing operating system with CloudReady, you can simply leave the USB stick in your computer. It's ready to use in this state, and you can immediately start browsing the internet with Chrome, access your Google Drive files, and anything else you would normally do with a Chromebook. Can I Open A Dmg File On Chromebook Laptop.