There is no Mac program that will do, both in function and in speed what the windows world has available in DVD Shrink, DVD Decrypter and DVDFab Decrypter. If you are without an XP machine, your best bet is to run XP under Bootcamp.
At this time Mactheripper takes double the time of DVD Shrink under Bootcamp. Plus, unlike DVD Shrink which will quit when it has a problem and is unable to rip a particular DVD, MTR will run for an hour as if it is working only to find out it was a no go. I have not used MTR's new beta, so I do not know where it is heading, but I believe the development team is working diligently on it and may in the future have a product superior to DVD shrink.