so im selling my macbook today and getting a top of the line 15" pro. im almost done zeroing out my drive (the entire drive, not the partition). when i go to reinstall osx do i just click install or do i have to make a new partition or what? sorry for the newb question i just haven't done this in a while. ---------- anyone? sorry for the bump but im selling this thing today i need a fresh install that works properly.