i just updated to 10.12.5 from 10.12.4, my def is mac mini 7,1 , gtx 670 , intel e3-1230 v2 (without GPU core)
the screen turned to black at login GUI, but i can ssh and remote to it. i actually used native nv driver on 10.12.4 and it worked flawlessly, i've installed nv web driver after updated...