GTX 760 not detected on Mac OS X Yosemite

Accelerated Computing CUDA CUDA Setup and Installation
1

Hi,

I have a Gigabyte GeForce GTX 760 4GB running under Mac OS X Yosemite 10.10.5. I have installed the most recent CUDA Toolkit and finished the setup as described in the Getting Started document.

I can build all samples and my own code fine. However, when running a CUDA app, my graphics card is not detected. The error is always something like:

cudaGetDeviceCount returned 38
-> no CUDA-capable device is detected

Using kextstat, I can verify the CUDA driver and the WebDriver are loaded:

82    0 0xffffff7f810fb000 0x3000     0x3000     com.nvidia.NVDAStartup (10.0.5) <12 4 3>
96    2 0xffffff7f8115d000 0x2e7000   0x2e7000   com.nvidia.web.NVDAResmanWeb (10.0.5) <95 90 76 12 7 5 4 3 1>
97    0 0xffffff7f81444000 0x1c4000   0x1c4000   com.nvidia.web.NVDAGK100HalWeb (10.0.5) <96 12 4 3>
99    0 0xffffff7f81c4b000 0x8c000    0x8c000    com.nvidia.web.GeForceWeb (10.0.5) <98 96 90 76 12 7 5 4 3 1>
128   0 0xffffff7f81d33000 0x2000     0x2000     com.nvidia.CUDA (1.1.0) <4 1>

What could the problem be here?

Thanks for your help,
Thomas