How To Make Copies of DVDs (Mac)

"Okay, you have created your master piece and burnt it to DVD using DVD SP or iDVD. As you only want this one copy and need hard drive space, you trashed the entire DVD project. Soon after, you find that you now need extra copies of the DVD (typical). What follows is the process for making DVD copies from DVDs that are not Copyright protected. We will use the Finder in Tiger, Panther and Jaguar.

As most of us only have one DVD drive in our Macs, this will be a two step process. First we will need to copy the information from the DVD to our hard drive and eject the original DVD. When we copy the original DVD will will make a 'disc image' (.dmg) of it on our hard drive. A disc image is an exact and perfect clone of the original. Then we will insert a blank DVD and burn the DVD disc image to the blank DVD." (instructions at link) How To Make Copies of DVDs: