I know this is covered extensively on google. instructions say to "Reboot the system while holding Command and R keys - that should boot you into the recovery partition" But how can i do a secure erase ? the option for doing a 3 pass or 7 pass secure erase is greyed out. how can i do a secure erase on the macbook air? (2012 mbair mountain lion) furthermore i found this article saying ssd might be impossible to securely erase unless you physically destroy the disc? http://www.informationweek.com/news/storage/data_protection/229219009?cid=RSSfeed_IWK_All help!