I've been using DVDBackup 1.3 for a couple years. It is simple to use and has never given me any troubles. I thougtht I'd try MacTheRipper because it continues to get updated, while DVDBackup has not been updated in over 2 years (but still works great, so no need, I guess). Anyway, I downloaded MacTheRipper 2.6.1 about a week ago, then v. 2.6.2, now 2.6.3, and this app either gives me an error reading a DVD, or else the app quits. i have not been able to use it to backup a DVD. So, it's back to DVDBackup unlesss 2.6.4 or later will work for me. G5 dual 2GHz/3GB/10.3.7/Sony DW-U10A 4x SuperDrive.