I was working in aperture today and also running iTunes, and that was it. I clicked something and it froze. Everything did i could not force quit or anything. Although the music was still playing it was not skipping or anything. THis is the second time this has happened. I do not like holding down the power button to restart my iMac it makes me feel jipped. I just paid all of this money for a new working computer. WHAT THE HECK This should not be happening. Anyone else having similar problems??