MacTheRipper is a freeware DVD ripper (extractor) for Mac OS X. It is dependent upon the open-sourced GPL libdvdread and libdvdcss libraries. According to the developer, “We also use the GPL ‘tocgen’ program in certain modes, which is a part of the ‘dvdauthor’ project. This product is made to backup DVDs you have legally purchased for personal use. Any copyright infringing activity you choose to perpetrate using this application is illegal, wrong, and beyond our control.”
“That being said, MacTheRipper removes CSS encryption, Macrovision protection, and sets the disc’s region code to ‘0’ for region-free by default, and is capable of removing RCE region protection as well, making an unrestricted copy of any DVD movie you own. It doesn’t rely on the DVD drive to get the CSS decryption keys, so that means that you do not need to play the DVD with DVD Player in order to rip it to your hard drive unprotected. MTR is also capable of removing UOPs, or User Operation Prohibitions, which are the settings that prevent you from skipping or fast-forwarding certain parts of DVDs, such as FBI warnings, previews, logos, intros, etc.”
More info and download link here.