Hey, there's nothing wrong with MACs! Let's hope there are new chips as well. Guitta, this basic question gets asked often, and we all are pretty clear on the answers now. Would this be time to put this basic question, and the simple answers in a FAQ? Vue Version 4 runs faster on a PC than on a MAC. Vue is more stable in the Windows 2000 and Windows XP Pro operating systems than in any of the other PC operating systems. Vue probably is more stable on a MAC in the latest operating system. Dual CPU's bring about the greatest speed in rendering, and probably the greatest speed in modelling. Memory (RAM) is next most important in VUE performance. The memory size and chip properties of the video card have little to do with rendering speed (since that is controlled by the CPU), but provide significant other benefits in terms of the quality and characteristics of the final render. (Shadowing, etc.) Open GL is preferred for many reasons, as a video technology, but VUE users should disable the Open GL Background Thread setting when modelling. It does help to re-enable it when the composition is complete, saved, and the user is ready to render. (At least, I think these are the simple answers to this general question.) ?????