so on my MacBook I was doing the recent intel update and it failed in the middle. Nothing would open so restartex the comp. Now the thing just sits at the pinwheel. I tried to use shift to boot but unless I did it wrong it did b not work. I have about 25 gigs of pictures I can't loose on there. What is the next step to take? Ps I posted this from my iPhone LOL! I have no other macs..