Most games these days want you to have a disk in your computer to play. One reason is this keeps people from giving a copy of the game to their friends. This can become a pain and a major annoyance on long trips or anywhere where you can't reach your disk, and you have a case of Call of Duty fever.
If only there were a way to trick the game into thinking the disk was in the computer. Enter the Disk Utility, a little application that comes in the utilities folder of every Mac. All you have to do is pop your disk in, open Disk Utility, select your disk, and click New Image. Name the disk image and save it somewhere. Now all you have to do is open the disk image, and the disk will appear on your desktop, just like any normal disk. The applications will not know the difference between a virtual disk and the real thing.
Disk images also give you the ability to open multiple disks at once on a one-drive machine. You can even encrypt disk images to easily store your sensitive files. Also, while we here at MacApper do not condone any illegal actions, the disk images are yours and lack any digital rights management. It is also just as easy to burn disk images so you can copy your disks as many times as you want. Disk Utility makes it simple to back up the disks of your favorite games and have them on hand any time you want.