So I'm running Motion 4 on my iMac. It's the newest one out with a 3.06Ghz processor, ATI Radeon HD 4850, and 4gig DDR3 ram. I'm trying to compile a 30sec scene where my camera pans out on a photograph revealing a field of photos floating in space. However, it seems to really slow my Mac down and twice Motion quit on me. I knew it would seem slow but not "slow as a turtle" slow. I especially didn't expect it to quit on me. So my question is, Is this normal? Is there anything I could be doing to speed things up or is this the way it runs?