I have just bought my first Mac computer and i purchased the 27' i7 Quad core 2.93 Ghz with 4 GB of ram. It arrived friday and since i completely froze the computer (Got the beach ball thing and nothing would respond) and iPhoto has frozen twice requiring a restart for it to work.At the time of the problems i was downloading apps, listening to music and importing photos to the computer and had adium, skype and maybe some other programs running. Am i trying to do much stuff or could i have a defected Mac?