Yes, there is a version of DVDFab HD Decrypter for the Mac. That is the FREE version of DVDFab which works as a full DVDFab demo for 30-days, and then reverts to only being a ripper after that. That licensing model is the same on Windows and the Mac.
If you've used the PC version then you should know that the program starts working initially in demo mode, and then reverts to ripper-only mode after 30-days. There's nothing new about that. The full DVDFab program has never been free, only the decrypter.