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+)
Single Time Machine Backups
Tired of Time Machine running all the time? You can turn it off in the Time Machine preference pane, but still initiate a single backup by choosing Back Up Now from Time Machine's menu bar icon. Of course, your backup is much less likely to be up to date, but Time Machine won't be taking any resources while you're trying to work.