Switch to the login window from the command line
# cf. http://www.mactipper.com/2008/07/securely-lock-your-mac-system.html, # http://www.macosxhints.com/article.php?story=20040724203315798 and # http://www.apple.com/downloads/macosx/automator/lockdesktop.html /System/Library/CoreServices/"Menu Extras"/User.menu/Contents/Resources/CGSession -suspend /System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -switchToUserID username alias lo='/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend' # <ctrl> + l help bind bind -P | grep -i c-l bind -x '"\C-l"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend' # <esc> + l #bind -x '"\M-l"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend' bind -x '"\el"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend' #--------------------------------------------- open -a 'Keychain Access' # go to Keychain Access > Preferences ... > General > activate "Show Status in Menu Bar" # now you can use "Lock Screen" via the Keychain Access menu bar item