Last night my best friend borrowed my Mac Book (2008 Model) to make a posting on Ebay de. The computer had use of a proxy server, stealth mode and private browsing. Little snitch pop up stating that someone wanted confidential inormation from my keychain. We denied both request.Feeling as though we were being hacked, we at once turned the computer off. Was this normal or a hacker? anything to worry about? Do I need to delete my harddrive?