I'm selling my mac and want to make sure the buyer wont be getting any of my info after doing the following. Here is what I did Step 1. Upgrade to Mavericks Step 2. signed out and unauthorized iCloud, Dropbox, iTunes Step 3. Reboot to Mac Utilities Step 4. Erased Hard drive partition Step 5. Chose "Reinstall Mac OS". Step 6. Was prompted for Apple ID and password to reinstall so I entered it. Step 7. Install finished - I am at a Welcome Screen which says, In just a few steps, you can register and set up your Mac. It is asking what country I'm in and has a world map on it. I assume that all is set and my information has been erased and removed. The only concern is that when choosing re-install Mac OS from the Mac Utilities Menu it then asked me to sign in with my apple ID. Also how do I exit the set-up screen safely? Thoughts? Thanks!