Well I also have a mac labtop, but mine is 2.4 GHz Intel Core Dou. When I run shaders and ray tracing it is 5 faps and auto closes at times.
So If it doesn't work on you, I'm assuming it is the same problem.
I suggest getting a new graphics card DRIVERS, if you don't know look here.
http://forum.toribash.com/showthread.php?t=184246