ae cc not recognising geforce 650m

I have a MacBook Pro 15" retina running 10.8.4 and After Effects CC v 12.0.0.404 but after effects cc will not allow raytracing via the GPU - see screenshot:

I have the following Cuda Drive installed: CUDA Driver Version: 5.5.25.

I have checked that the GeForce 650M card is in the list of the file raytracer_supported_cards.txt.

Does anyone know how I can get this working?