i use Quadro 4000 for Mac on my Mac Pro 1,1. Surprisingly it work, but yes no CUDA enabled, though i installed it’s later CUDA driver. Also, you can not see the Apple boot logo. Just black screen for a couple of second, then white/grey screen appear and then your desktop.
This graphic card is original for Mac. Not a flash one. I use this on my Mid 2010 Mac Pro that’s been dead for months.






