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)
View Extra Audio Details in Snow Leopard
In Snow Leopard, Option-clicking the Volume icon in the menu bar displays a list of sound input and output devices. Choose one to switch to it; it's much easier than using the Sound preference pane. Also, hold Shift and click the icon to set the system volume, which is separate from the general output volume.