Comment by giobox

Nvidia still offered the "unofficial" official driver for a long time that let you run unsupported GPUs in Mac Pros or Hackintoshes for quite a while. I ran a couple of Maxwell generation NVidia parts this way, even though macOS out of the box didn't support them, Keppler wasn't the last that worked.

The only downside back then was when a new macOS release hit, you would have to wait for Nvidia to release the updated third party driver. IIRC there was one major OS ten release I was stuck waiting a few months before the driver landed. This extended the lifespan of a lot of Mac Pros greatly!