saludos he querido activar el GPU o el CUDA para after effects en i mac pero no se como hacerlo ya que solo con las tarjetas Nvidia me aparece como activarlo me pueden decir como hacerlo gracias
The only thing After Effects uses the GPU to accelerate is the ray-traced renderer. See here: GPU (CUDA, OpenGL) features in After Effects
The ray-traced renderer is not being developed any more. The After Effects team considers it obsolete. Cinema 4D which comes free with After Effects CC and CC 2014 is a better way to do 3d in AE: details of CINEMA 4D integration with After Effects
AMD cards can never have CUDA acceleration because CUDA is a proprietary technology to NVIDIA.
Third-party plugins for After Effects such as Red Giant Universe and Element 3d can use the GPU to accelerate their functions, but they're not limited to CUDA cards, so you can use AMD cards to accelerate them.