I have a iMac and a Macbook (unibody before they became "pro"). Both are 2.4Ghz models with 4Gb of RAM. I think the iMac has a slower system bus, but they are pretty close otherwise. I can rip DVDs and convert videos on the Macbook all day long without problems. But Handbrake always quits unexpectedly on the iMac. I have downloaded the latest version of Handbrake, uninstalled several times, and totally leave it alone while running Handbrake. Nothing prevents this from happening. Does anyone know what could be causing this problem or another (free) program that will do what Handbrake does as easily? I officiate basketball and I have a lot of friends who are asking me about pulling clips from game DVDs. With Handbrake it is easy to rip the DVD and trim the clip using Quicktime. If someone knows of an easier process I'm all ears.