NVIDIA DRIVERS Quadro & GeForce macOS Driver Release 378.10.10.10.20. I'm going to try the same process on an even older AMD-based MBP and see if that works better. It seems to work badly either way, but less badly with the Nvidia Web Driver.even so the FCPX share process disrupts everything else on the computer (which it did not do in the past). Then trash all FCPX preferences (user/Library/Preferences/). It looks to me that the best option is to get all this installed (don't follow the instructions to trash all the CUDA drivers that you might find elsewhere, that caused a re-boot to get stuck). Then you can choose whether to run Nvidia Web Driver or OSX Default Graphics Driver (a restart necessary to switch between them). If they are installed correctly you'll have two Nvidia preference pages in the System Preferences (and it will probably install a little Nvidia option on the menu bar, which you can turn off in System Preferences). Since the v471. You can download the CUDA and 650M drivers and install them. My guess is that the current Nvidia drivers for the 650M aren't quite working (since exports get slower as they go, I'm going to guess that the GPU is not loading/unloading VRAM and getting clogged up, or it is not handing off tasks between the Nvidia GPU and the onboard GPU on the Intel CPU ). So, FCPX 10.2.3 was working well on my MBP, but 10.3.4 is REALLY slow on Share (export). FCPX does not use CUDA, and depends on OpenGL/OpenCL which is more of an AMD thing. Adobe folks seem to be saying that the CUDA update is helpful, but I haven't tested that. You can download what seem to be working (not beta) drivers from Nvidia at the links below. If you do start down this path, the only way to turn back is to re-install High Sierra (which might actually take less time than installing and testing the new Nvidia drivers).But, here's where I'm at now: There are lots of overlapping issues here, and it is hard to sort them out because of how long it takes to restart in High Sierra (10.13.1) with 2012 Macbook Pro Intel i7 ( 3615QM) CPU 2.3 GHz Nvidia GeForce GT 650M 16GB RAM (I know it's old, but it's been working fine, I like the Superdrive, and all in all High Sierra seems fine, but it doesn't like the Nvidia GPU especially in Final Cut Pro 10.3.4).
But, in my testing so far it seems that the updated Nvidia Web Driver (download from Nvidia see links below) is helpful, so proceed with caution. Probably the best option is NOT TO INSTALL any of the new Nvidia drivers and just wait for Apple to update High Sierra with whatever new drivers they build/get for Nvidia. These were intended for Classic Mac Pro 5,1 users that used discrete Nvidia graphics cards. The last release of Nvidia Web Drivers for macOS occurred November 17th, 2020. It seems that FCPx 10.3.4 and Nvidia GeForce GT 650M do not like each other.
Select the option NVIDIA WEB DRIVER if you been asked.