I understand this question probably got asked hundreds of times before, but after putting up with this problem for a year and spending many hours trying everything I can find I still can't solve this issue.
But doesn't matter if I reboot the machine, disable graphic card switching, removing old CUDA driver and re-install, the problem persists.
I've already updated AE to 184.108.40.206 and CUDA driver to 6.0.51.
I'm still getting warning by AE each time I launch the program that my graphic card can't support raytracing and I need to update CUDA driver.
Also I'm not able to enable CUDA support in Premiere or Media Encoder.
I learned of this problem since I bought the computer back in March last year, given the popularity of this model of MBP I thought Adobe will address the problem rather quickly, not realizing that after more than a year this problem still persists.