Apple has released MacBook Air SMC Firmware Update 2.0, the second system management controller update to address battery issues (see “SMC Firmware Updates for MacBook Pro, MacBook Pro Retina, and MacBook Air,” 3 October 2013). Directed at MacBook Air models released in the middle of 2013, Update 2.0 fixes a problem that caused the battery to drain more quickly than expected with the lid closed. As always with firmware updates, we recommend relying on Software Update to ensure you get the right update for your particular model. Be careful not to interrupt the update process! (Free, 804 KB, 10.8.5+)
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Set a Default Finder Column Width
When in column view in the Finder, if you want to set the width of all the columns to something different - and have it stick! - Option-drag one of the column handles at the bottom of the window.