The answer to that is "don't know".. there is a linux/unix one tho.. probably will have to compile the source yourself.. http://dvdshrink.sourceforge.net/
I have windows parallel and use the windows version of DVD shrink. If there is a OSX DVD Shrink I couldnt find it either.
There isn't a dvd shrink that works well with mac in fact even popcorns dvd shrink option has issues you should have used mac the ripper and ripped the dvd movie only this would have shrunk the dvd down
This seems like an informed thread. I have a friend that is really into music. She has a Mac. I am going to help her go digital. None of my audio tools have versions for the Mac. itunes down grades high quality MP3s when you play, burn to CD and sync to an ipod on my PC. I assume it does the same on the Mac. I am trying to locate a ripper for the Mac that will create high fidelity lossy music.