Hi guys, I own a GTX 660 graphics card which works perfectly with Sierra inside a Mac Pro 2010 and I'm running 2 monitors, a Sony x720e 49" 4K and a HP 27es. There's the normal issue of not seeing the Apple logo at start up but that's ok. When High Sierra came out, it introduced graphic artifacts and the card is completely unusable. Having said that, is there any card (AMD or NVIDIA) that I can purchase which will work right out of the box... meaning... not adding any codes or working with system or graphics files to make it work? I would like to purchase a card that is completely "plug & play". Thanks!