DMG files are mostly used as software installers for the Mac OS platform. These layers are identified in the hdiutil command line as 'CEncryptedEncoding' and 'CUDIFEncoding'. The DMG format has replaced older disk image formats used with Mac OS 9 and earlier versions of the operating system.ĭMG files are raw disk images that contain block data and may have one or two additional layers applied to add encryption and compression. The DMG file extension is associated with disk images created for Mac OS X.
