Apple has quickly issued MacBook Pro (Retina) Trackpad Update 1.0 for its just-released MacBook Pro with Retina Display to address an issue that affected the trackpad’s responsiveness (see “New MacBook Pro Features Retina Display, Flash Memory,” 11 June 2012). The updater will be installed into the Utilities folder within your Applications folder, and will launch automatically. (Free, 1.26 MB)
Keyboard Shortcuts in Stacks
You aren't limited to using the mouse or trackpad to select items within a stack. Once you've clicked a stack to open it, you can type a letter to jump to the first file starting with that letter, or press either the Tab or arrow keys to move among the stack's contents. Press Return to open the selected item.
Visit plucky tree