command not found: nvidia-smi

I have installed CUDA7.5 on my hackintosh. It works fine to compile the examples and pass the test.
But I cannot find the nvidia-smi for checking my GPU(GTX970). I have check the directory /usr/local/cuda/bin
and /usr/local/cuda/tools.

I also tried reinstall cuda7.5, that doesn’t help.
Anyone can help?

The nvidia-smi utility is based on the NVML library. Per this previous answer, NVML is not supported on OS X: https://devtalk.nvidia.com/default/topic/839954/cuda-programming-and-performance/command-line-gpu-load-display-on-os-x/post/4563535/#4563535