OS X Mountain Lion available today for $19.99

OS X Mountain Lion, the ninth major release of the Mac's operating system, is available today as a download from the Mac App Store.

The new operating system includes more than 200 new features including iCloud integration, the all-new Messages app, Notification Center, system-wide Sharing, Facebook integration, Dictation, AirPlay Mirroring, and Game Center.

“People are going to love the new features in Mountain Lion and how easy it is to download and install from the Mac App Store,” said  Apple’s senior vice president of Worldwide Marketing Philip Schiller. “With iCloud integration, Mountain Lion is even easier to set up, and your important information stays up to date across all your devices so you can keep editing documents, taking notes, creating reminders, and continue conversations whether you started on a Mac, iPhone or iPad.”

Mountain Lion is available as an upgrade from Lion or Snow Leopard (OS X v10.6.8 or later) for $19.99. It requires 2GB of memory and 8GB of available space. You can view the complete list of system requirements and compatible systems from the OS X Mountaion Lion specs page.

Below are quick descriptions of just some of the 200 features included in Mountain Lion:

• iCloud integration, for easy set up of your Mail, Contacts, Calendar, Messages, Reminders and Notes, and keeping everything, including iWork® documents, up to date across all your devices;
• the all new Messages app, which replaces iChat® and brings iMessage™ to the Mac, so you can send messages to anyone with an iPhone®, iPad®, iPod touch® or another Mac;
• Notification Center, which streamlines the presentation of notifications and provides easy access to alerts from Mail, Calendar, Messages, Reminders, system updates and third party apps;
• system-wide Sharing, to make it easy to share links, photos, videos and other files quickly without having to switch to another app, and you just need to sign in once to use third-party services like Facebook, Twitter, Flickr and Vimeo;
• Facebook integration, so you can post photos, links and comments with locations right from your apps, automatically add your Facebook friends to your Contacts, and even update your Facebook status from within Notification Center;
• Dictation, which allows you to dictate text anywhere you can type, whether you’re using an app from Apple or a third party developer;
• AirPlay Mirroring, an easy way to wirelessly send an up-to-1080p secure stream of what’s on your Mac to an HDTV using Apple TV®, or send audio to a receiver or speakers that use AirPlay; and
• Game Center, which brings the popular social gaming network from iOS to the Mac so you can enjoy live, multiplayer games with friends whether they’re on a Mac, iPhone, iPad or iPod touch.
• Gatekeeper, which makes downloading software from teh Internet safer
• Power Nap, which automatically updates your apps and system while you Mac is asleep
• Faster Safari browser