How to Extract a RAR Computer File. While downloading software applications for your business, you may encounter files that you cannot open. Some software developers and publishers use the RAR ...

Archive a folder Open the Disk Utility app that came with your Mac. Choose File then New Image and lastly Image from Folder. Then pick a folder with all of the files you want to save to the DMG.

Windows is frustrating, nuff said. How does an Apple Disk Image file, aka .DMG, not being able to open natively on Windows make Windows frustrating?