Having my Mac lock when ever my screen saver starts can be a pain when I'm at home and I don't need it to be locked. That is why I enabled an icon in my menu bar that lets me lock my Mac with two clicks. However, the process of getting this in your menu bar is probably not what you would think. First open Keychain Access and then go to the Preferences and check the box that says Show Status in Menu Bar. That will put a little lock icon in your menu bar. To lock your screen just click the lock and select lock screen.