What do I do, when the starting Mac OS X screen gets stuck? Okay... So yesterday I installed the updates. I think it was Mac OS X 10.5.5. But I was in a rush so I needed to turn off the computer. While the update install was in progress. So now the computer was turned off. And I turned it off while it was installing the updates. When I turned it on, the Mac OS X start screen just gets stuck. You know the grey background with the apple in the middle. And the little loading thing under the apple. The loading thing just keeps going, round and round and round. I have tried having it turned on, for hours. But it still keeps loading. PLEASE HELP ME!!!! WHAT SHOULD I DO!? I NEED MY MACBOOK!