This is probably a silly question... But I'm trying to sell my 2009 17" MBP. I'd like to wipe it clean with fresh OSX install. I spent the better part of the day downloading and reinstalling OSX looking for the "fresh install" option. Once everything rebooted I still had all my data, apps and settings loaded up. What did I miss? And is there an easier way to erase all content and settings to bring it back to "from the store" condition without downloading and reinstalling the entire OS? Thanks!!