Try iSkysoft
DVD Ripper for Mac. It's a great one-click solution.
It can rip DVD video to video formats including MP4, AVI, MOV, M4V, 3GP, MPG, MPEG, FLV; and it can convert DVD audio to MP3, M4A, AAC, AC3, etc. Best resolution to rip a dvd to video or audio format.
It is $39.
The trial version should be fully functional for what you want to do.
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