miles99, here are my results to OctaneBench 3.06.2:
View attachment 328947
Let me be clear, on 10.13.4 Security Update and iMac,15, I am using the latest NVIDIA CUDA driver available 387.178:
View attachment 328957
CUDA Mac Driver
Latest Version:
CUDA 387.178 driver for MAC
Release Date: 04/02/2018
The URL for the CUDA driver archive where you can always find the latest driver:
http://www.nvidia.com/object/mac-driver-archive.html
I am
not using the developer CUDA Toolkit 9.1.128, as you apparently are. Here are the contents of that downloaded .dmg file:
View attachment 328958
My driver was released 4/02/2018 and yours was released no later than 12/20/17, at least if you're using the driver from this toolkit.
Though you may have a good reason, I'm not sure why you're using the 9.1 CUDA Toolkit or macOS Sierra 10.12.3 rather than 10.12.6. With 10.12.6 even, you would have a different NVIDIA web driver and presumably an updated CUDA driver to match.
I really believe that if you want to try to use 10.13.4 or above, and are currently trying to use the CUDA toolkit with its driver, then you should uninstall the CUDA Toolkit using AppDelete or any of the proper uninstallers and then install the CUDA 387.178 driver for Mac (and the 30.107 web driver before that if you haven't). I would install both using the downloads directly from NVIDIA (rather than a bash script) so that you have the preference panes installed. And pay attention to whether you have SIP enabled or not, and try it differently if it doesn't work right after the install, as noted by
vulgo in #560 and #563.