I'm gonna receive it next week, and I know a bunch of people had trouble with the set up. From what I read the problem is with something called FireWire? (Don't know what that is and don't remember seeing that option in set up) Basically, I'm simply going to set it up as a new Mac (no restore) and add my Apple ID to set up iCloud. Is that ok? Am I going to **** up the computer? Is there something I should be careful for?