Mountain Lion

The moniker for Mac OS X 10.8, released via the App Store on 2012-07-25.

See the Lion page as well.

Resources:

Date Command Notes
2013-05 defaults write com.apple.loginwindow LoginWindowLaunchesRelaunchApps -bool false Disable the stupefyingly idiotic automatic app relaunching upon reboot "feature", that caused me untold pain every day.
2013-08 terminal-notifier A command-line notification tool.
2013-11 open "/System/Library/CoreServices/Wi-Fi Diagnostics.app" The built-in Wi-Fi diagnostics app, crammed with goodies.