CUDA driver version is insufficient for CUDA runtime version

I saw the same at runtime with the latest driver on Mac OS 10.6.

cudaError_t error = cudaGetDevice(&device);
printf("%s\n", cudaGetErrorString(error));

I went back to the developer site, downloaded the driver again and now it runs. http://developer.nvidia.com/object/cuda_3_1_downloads.html#MacOS

You need to ensure that your driver version matches or exceeds your CUDA Toolkit version.

For 2.3 you need a 190.x driver, for 3.0 you need 195.x and for 3.1 you need 256.x (actually anything up to the next multiple of five is ok, e.g. 258.x for 3.1).

You can check your driver version by either running the deviceQueryDrv SDK sample or go into the NVIDIA Control Panel and choose System Information.

Download an updated driver from www.nvidia.com/drivers.