Reverting to release notes that make haiku seem wordy, Apple has released something called OS X Mountain Lion 10.8.2 Supplemental Update 2.0 that claims to address “an issue with Keychain that can affect 2012 Mac systems.” It’s recommended for all Macs introduced in 2012, but there’s nothing else that hints at what it fixes or how serious the “issue” might be. It’s available via the App Store’s Updates screen, and if it doesn’t appear for you, it’s presumably not necessary for your Mac. (Free, 26.65 MB)
Quickly Navigate Up in the Finder
If you're in a Finder window and want to navigate up a level in the folder hierarchy beyond the currently selected level, simply press Command-Up arrow. (You can also Command-click the Finder window's title to pop up a menu of higher levels.)
OS X Mountain Lion 10.8.2 Supplemental Update 2.0
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