Hi all, I need your help, like the thread title states, I can't install the nVidia graphics driver update, and the option to choose the nVidia driver as the video card driver is greyed out and the system is defaulting to the Mac driver which is not allowing me to use my GTX 980 in my Mac Pro. Right now I am using my old GT 120. Some Specs : 2009 Mac Pro Flashed to 2010 OSX 10.11.4 El Cap Hard Drive, Main : 480gb OWC PCIE SSD Hard Drive, Storage : 3, 7200 RPM drives striped into 1 Hard Drive Bootcamp for Winblows : 1, 1gb OWC SSD Video Card : EVGA nVidia GTX 980 SC (Currently using old GT 120) RAM : 32 Gigs (All OWC) This issue seemed to start happening at the start of the OSX update before this most recent one (!0.11.2?) I have tired downloading other Drivers from MacVidCards Page : http://www.macvidcards.com/drivers.html ...But none of those would install. Here is a screenshot of the error : And one of the unavailable states of the driver (Even after I authenticate / unlock my settings) : Not sure what to do here, any suggestions? Thanks!