Apple released the latest version of its operating system, the OS X Mountain Lion today. You can purchase it from the Mac App store for $19.99. This new operating system will be available for free when your purchase one of the latest Mac models or if you purchased a Mac on June 11 or later, you will be eligible to get it for free as part of a free upgrade.
Apple is expected to drop its new OS X Mountain Lion software on July 25, according to a recent report. A previous announcement had claimed the upgrade would be launched this month, however, no exact date was ever given. However, according to 9to5Mac July 25 now seems the most likely release date.