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+)
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.