Submitted by michael on Thu, 01/01/2015 - 16:03 URL http://www.wikihow.com/Make-a-DMG-File-on-a-Mac How to Make a DMG File on a Mac. One way to store or group files on a Mac is to create a Disk Image. A Disk Image is a file which has the properties of a separate hard drive or CD. It has a size limit and options for encryption to keep... Tags WikiHow Make a DMG File on a Mac wiki how to articles how to instructions DIY tips howto learn how do I