Hello everyone. My 24" iMac should be here next week, and I just need to know one thing (for now). Is the firewire 800 port powered? The reason I ask is the external HD enclosure I purchased requires it's own power supply. I planned on using the drive to transfer files from my PC to my Mac. So if the firewire 800 port is powered I can leave the power brick attached to my PC, and have the iMac power the HD. As always thanks in advance. I cannot even begin to tell you how much I've learned on here just reading through some of the threads.