dyld: Library not loaded: @rpath/libcudart.9.1.dylib
Thanks for the effort.

Any idea where I can get libcudart.9.1? Is it from an SDK for CUDA? Thanks!
Yes, you need this:
https://developer.nvidia.com/cuda-downloadsIt's a full dmg package that I used for cuda 9.1.
To my surprise, still mining non-stop with same hashrate
