OS X Mountain Lion has been released by Apple. The major update to Mac OS provides over 200 new features, including iMessage support, Reminders, Notification Center, Notes, Game Center, extensive iCloud integration, and much more.
The upgrade costs $19.99 but is available for free to Mac users who bought a Mac within the past month.
Apple’s generous licensing terms allow you to install a single purchase of Mountain Lion on all of your personal Macs. If you don’t want to re-download OS X 10.8 each time on each computer, you can make a Mountain Lion boot installer from any USB drive or DVD.
Be sure to back up each Mac before installing, follow our simple guide on things to do before upgrading if you haven’t done so yet.