http://docs.info.apple.com/article.html?artnum=303407
"The GMA 950 allocates a base amount of 80 MB for video and boot processes at startup."
"Mac OS X may make additional main memory available to the graphics processor for texture use beyond the base 80 MB amount mentioned above, depending on the application being used. The most common types of applications that request more system memory to be used as graphics memory are 3D and graphics-intense applications."
Men det finns inget sätt att ställa in det.