I have a new iMac and need to transfer the photos and itunes from my old one (2004 model). I bought the firewire cable the person in the apple store told me to buy, but the ends are both the same. The port on the old imac is not the same shape as the one on the new. I want to order another one online but don't know how many pins I need on each end. This is probably a really stupid simple question, but my life is EXTREMELY hectic, and this dumb issue has had me roadblocked for two months. Please help!!!