Complete Guide to Graphics on El Capitan with Specific Problem Solving
I made a video about how to get the 750ti working in OSX Mavericks. Here is how to get the 750ti and most Nvidia graphics cards working in El Capitan. I included some specific problems and solution such as cannot boot, black screen on boot, OSX can't see my graphics card/isn't using my graphics card, how to install alternate graphics, OSX says my graphics card has 0mb of VRAM.
Here is the page for the NVidia Alternate Web Drivers for 10.11.3: http://www.nvidia.com/download/driver...
If you need to find alternate drivers for a different version of Mac OSX simply look up "tonymacx86 nvidia alternate drivers" and then the version of OSX you have.