So i updated my computer last night it says "do you want to restart bla bla bla" I say no I will later. then today I restart my computer. I starts to update with the apple logo screen, and the spinning wheel, and the progress bar at the bottom. then it stops about a quarter of the way and stays on the spinning wheel without the progress bar, my mac never boots up and will stay at the spinning bar forever.
+k for help -K for trolls