I've tried searching for fixes and can't find any. Hoping someone here can help walk me thru. We're running Bootcamp on our Mac and typically use Windows on it 99% of the time. All of a sudden when my children's mother wants to Facetime our daughter, the Mac boots up into the "stop sign" symbol and won't start. I've tried to boot it into safe mode with both just holding down the shift button and also hitting the keyboard power button then immediately holding down shift after the bootup chime, and still the same results. Stuck in the original CD inside the box and also the applications CD and nothing starts. Now I don't know what else to do.