"The only reason I can't get maximum perforance from X-Plane is it does not make use of all the processor cores of the Mac Pro.<br>I am looking forward to Snow Leopard. I am hoping it will help."<br><br>I wouldn't look for Snow Leopard to do any real magic here. Think of Snow Leopard as providing an easier means for Laminar Research to improve the XPlane code such that it makes better use of multiple processors, etc. Ultimately, I believe it will require a manual effort on the developer's part to make use of Snow Leopard's features. Considering that they support multiple platforms, I'm not sure there is any guarantee they will make any such changes.<br><br>