macOS compatibility

[JavierSanchez-Utges]

Is GrASP compatible with macOS? I think it might not be as certain dependencies, most of them CUDA-related seem not to be compatible with this OS.

[zwsmith200]

This is likely related to the pytorch install. We can add a version without CUDA as part of #7 .

[JavierSanchez-Utges]

Yes, I believe all the libraries without macOS support are NVIDIA CUDA ones. CUDA-less version sounds great! Thanks!