Can I reformat an older macbook pro over firewire from a retina macbook pro, and if so how? What I have: Old (2009) MacBook Pro, with Mountain Lion. OS is in bad shape - that's as technical as I can get in saying it's slow, painfully slow and doesn't perform basic tasks. Needs to have the OS reinstalled. Can't get it to see the original install disk, or even recognize a dvd to burn a recovery disk. New (latest model) 13" retina. Gorgeous by the way. Have a copy of the "install mountain lion OS X" from when I upgraded the old machine. I also have an external HD and a time capsule, if that's necessary. My USB stick is only 2GB so seems this won't work? Can I reformat the machine? I want to wipe the old one clean securely and start from scratch with a fresh install. Thanks for any thoughts for my unsophisticated self.