Apple has released MacBook Pro (Retina, 13-inch, Late 2013) Software Update 1.0, which affects only those who have purchased one of the just-released models (see “New Retina MacBook Pro Models Thinner, Lighter, and Cheaper,” 22 October 2013). However, as this update solely replaces the missing Simplified Chinese and Traditional Chinese OS X Software License Agreement with a fresh copy in your Documentation folder, you can probably skip this one, particularly if you’re not using either of these localizations. (Free, 5 MB)
Disable Caps Lock
If you find yourself pressing the Caps Lock key accidentally as much as I do, note that you can disable it entirely in Mac OS X. Open the Keyboard & Mouse preference pane, click the Modifier Keys button, and in the dialog that appears, select No Action from the Caps Lock pop-up menu. You could remap it to another modifier instead, but that might make using differently configured Macs more difficult.
MacBook Pro (Retina, 13-inch, Late 2013) Software Update 1.0
Set up short abbreviations which expand to larger bits of text,
such as "Tx" for "TextExpander". With the new custom keyboard,
you can expand abbreviations in any app, including Safari and