I have a new Mac Pro. On startup I must hold down the "C" key or all I get is an empty blue screen. Then it starts normally. I have 4 drives. One of the new drives is my startup drive with the system and all applications. The old stock drive is now my PS scratch disk. The other two drives are set up in RAID 1. It's really just an annoyance. The machine works perfectly otherwise. I couldn't be happier. I'm just afraid it might turn into something worse. Any ideas?