Currently Being ModeratedNov 21, 2013 9:42 AM (in response to andrewdx)
First of all, see > http://support.apple.com/kb/HT5189?viewlocale=en_US&locale=en_US
In step 4, follow all the steps for OS X Mavericks but, after going to the Erase tab, select "Security Options" and choose one of the secure erase options. Note that a more secure option will take more time. Finally, reinstall OS X and turn off your MacBook Pro.