In addition to adding compatibility with OS X 10.8 Mountain Lion, Apple has updated Aperture to version 3.3.2 with a smattering of improvements. The professional photo organizer now enables you to sort projects and albums in the Library Inspector by date (in addition to name and kind), and adds the capability for Auto White Balance to correct color using Skin Tone mode (even when Faces is disabled). The update also fixes an issue that affected performance when entering or exiting Full Screen mode. ($79.99 new in the Mac App Store, free update, 530 MB)
Sleep (and Lock) Your Screen
When you are walking away from your computer, it's fairly common practice to start your screen saver and lock your screen. But did you know that there is a built-in keyboard shortcut in Mac OS X to sleep the screen?
Press Control-Shift-Eject and your monitor sleeps without engaging the screen saver.