mac mini won't restart after yosemite update,
After yosemite last update or upgrade , call it what you want, my friends mac-mini wont restart. mac goes to restart screen and jams in half of progression bar, he left it on for hours on end, and nothing it'S jammed. Thank you for any help... I have a MacMini my self, i'm really good in microsoft world but in apples I'm still in baby steps...