Oh, hold on you want DVD shrink for Mac OS X. Give me ten minutes. I can't remember what it's called.
Handbrake is for ripping+encoding DVD movies to like AVI files.
Okay, there's also Mac the Ripper:
http://www.mactheripper.org/
I can't seem to find something like DVD Shrink or k9copy for Mac OS X. So just rip in full quality or something, and author it with iMovie. You won't keep the menus or anything.
I've posted in another forum, I will probably have a reply in no time.