I cannot lock my MacBook Pro with Shift + Alt + Eject shortcut I have Apple keyboard (with numerical pad) connected to my MCP, but I can't lock my screen with ctrl+shift+Eject. Is there other way to fastly lock screen or some way to fix that?
To trigger the login window, select System Preferences from the Apple menu, then navigate to Security &amp; Privacy > General. Check "Require password"

You will then set options for the duration within which to require a password. In your case, you want to set it to immediately.