Same problem here (OS X 10.3.3), Nvidia GTX 960, Gigabyte GA-Z170 X-GAMING 7, i7 7700K. I tried to downgrade the Nvidia Drivers to 104, 103. Didn't work. Tried 161, 160, 157, 156, same problem. I'm at 156 right now. It's laggy as hell, sluggish. Any ideas ? Here's my config.plist.