MacTheRipper Replacement
Sorry, it's not free ($24.95) but well worth the price. I use Mac DVD Ripper Pro (MRDP). It supports all the way to Mavericks (a good free upgrade from Snow Leopard and above if you have at least 4GB of memory) and rips commercial DVDs. It defeats most encryption and when it doesn't using it in conjunction with FairMount (free) it often even solves those problems. They've also recently acquired DVDRemaster Pro (still works if you have it) from Metakine, which cost more and almost always required Fairmount to get a workable rip from encrypted media, and they say they will analyse that product incorporate any useful features they find in it. I know you said free but I don't think you'll find anything at that price that works. I've looked. Honest, MRDP is worth the price of one BlueRay (though it doesn't work on them). To rip BlueRay you'll need MakeMKV (shareware for $50) and a drive. Hope that helps.