Here's a simple guide on how to rip a DVD in OS X to backup your collection of DVDs.
Things you need.
Note that there are limitations with the trail. 2 Hour limited, and I believe it only does stereo.
1. Start up MacTheRipper, if there are no checks, there should be no problem. Sometimes a DVD does have it and you have to set it to the correct region. RCE1 is for US.
2. Once you are ready, press the "GO!" button to start the process. Also note that depending on the size of the movie and your computer this can take a while.
3. Once, it's done, the Bombergirl message will display, press OK and quit MacTheRipper.
4. Start up DVD2oneX2, a menu will pop up. For movies, I usually just rip the movie, if it's a Season of some show, I pick the first option.

6. I keep everything stock pretty much except I choose 5.1 when the DVD movie offers it. Once you are ready press the green button.

7. In my case, I create a Image instead of burning. The reason why is this program does not pick up my USB DVD burner. I'm on a older Core2Duo Macbook that only has a CD burner.

8. Press OK and it will start the process! If you are like me and you have a external DVD burner, refer to this guide on how to burn a Image in OS X here.