DMG files are actually Mac OS disk image files. But before proceeding with the ways to open or view a DMG file, it is better if we have a thorough knowledge of what a DMG file exactly is. It automatically extracts the contents of the files to your computer Opens encrypted or non-encrypted DMG files. RECOMMENDED: Click here to fix Windows errors and improve PC performanceĭMG Extractor is ideal if you need to: Extract content from an Apple.dmg file Extract the.IPSW restore file from an iOS beta Extract contents from IPA files Functionality & features.