Please Apple fixe the Nvidia 650M GT drivers !!
After various install and reinstall of High Sierra there is definitely something wrong with the Nvidia 650M GT, heavy graphics task or apps just crash or lag.
I can't work on Final Cut Pro with my early 2013 Macbook Pro Retina ! After a few minutes in FCP X the system starts to lag, whether it's the Finder or Google Chrome.
Please Apple release an update!
MacBook Pro with Retina display, macOS High Sierra (10.13.1)