What Is a Macintosh Disk Image?
A disk image is a virtual drive, or mirror image of a physical drive, that is used by most operating systems. In Mac OS, disk images are used to store applications and files.IdentificationDisk image files in Mac OS X have the extension .dmg. When opened, they appear as an external drive in Finder.UsageCopy files to and from a disk image just as you would to a flash drive, and save the disk image itself on a hard drive just like a normal file.FeaturesDisk images can be compressed to reduce size, and can be password protected.BenefitsDisk images make it simple to install applications. Copy the application from the disk image to the application folder, then “eject” the disk image.ConsiderationsApple disk images can be opened in Microsoft Windows using third-party software.
