I've written up my notes on how to get the proprietary Nvidia driver working on Linux Mint 22.3 on a MacBook Pro 2013 (GT 750M). It really does make a difference over the default nouveau driver even for basic things like web browsing, so I hope it helps someone else.
https://www.stevestreeting.com/2026/01/26/linux-mint-22.3-on-an-old-macbook-pro-nvidia-gpu/