One of the things I missed when I switched to this MacBook was the easy ability to lock my screen. When I leave my desk at work, I desperately do not want some hooligan sitting down to write the president of our university an email, asking for a pony while using my account. Gnome, the user interface I prefer with Linux, has screen locking available from the logout window pretty easily, and in Windows I just have to perform the three-finger-salute (alt+ctrl+del) to get a Lock Screen button. But there was nothing obvious in OS X to mimic this functionality.
Rob at work showed me how to lock the screen on OS X server, though, which is identical to OS X for the desktop, so I thought I’d share.
Step 1: Opening the Keychain Access utility
First, open up the Utilities folder. You can get to this by either hitting Command+Shift+U with the desktop (Finder) selected, or by opening Finder, browsing to the Applications folder, then double clicking on the Utilities folder.
Step 2: Opening the Keychain Access Preferences
Once you have Keychain Access opened up, you’ll see the Keychain Access window on your screen. You can ignore this, because what we really want to get into are the Keychain Access preferences. To reach these preferences, click on the words Keychain Access at the top left of your screen and then select Preferences from the drop-down menu.
Step 3: Modify Keychain Access Preferences
All we need to do in this window is check the box labeled Show Status in Menu Bar. Once completed, go ahead and hit the red button (X) at the top left of this window to close it. You can also close the main Keychain Access window.
Step 4: Lock Screen (if so desired)
You can now lock your screen by using the padlock icon at the top right of you screen, located on the menu bar to the left of the clock and other icons.