with after effect CS6 on macbook pro (under yosemite) with a iris pro from intel i can't activate the gpu render in the graphics options even i try with installing the latest Cuda and the way i found on video maze forum,have somebody experimate a solution?
Do not install CUDA software on a computer without CUDA (Nvidia) hardware. Doing so can be very damaging.
The GPU is almost entirely irrelevant to After Effects.
See this page for details of the few things that the GPU does with After Effects: