Motion requires the standard graphics card found in any Mac Pro, MacBook Pro, iMac Intel Core Duo, Power Mac G5, iMac G5, a 1.25 GHz or faster PowerBook G4, or a 1.25 GHz or faster flat-panel iMac.
while it sys that, i run it perfectly fine on my 2.0 GHZ CD 1 gb ram blchbook
so it does actually work on a macbook then? obviously at a reduced speed, but i'd mainly be using it for just final cut.