Check out leaderboards and achievements.Log in to the Game Center app to see friends in your gaming network.Play live multiplayer and turn-based games against friends on iPhone, iPad, iPod touch, or Mac.Tweet right from your apps with the Tweet sheet.Sign in to Twitter, Flickr, and Vimeo once to start sharing.

Share with Mail, Messages, and AirDrop.Share links, photos, videos, and other files right from the app you're in.Configure your notifications to receive just the ones you want.Open Notification Center from anywhere in OS X to see recent notifications.New notifications appear in the top right corner of your screen.iCloud Tabs makes the last websites you looked at accessible on your iPhone, iPad, and Mac.*.Pinch to see tabs with Tab View and swipe to switch between them.Type both searches and Web addresses in the new Smart Search Field.And iCloud keeps your Reminders and Notes up to date across all your devices. Jot down your thoughts with the new Notes app. The new Reminders app makes managing tasks easy.Documents in the Cloud lets you create and edit your documents on your Mac, iPhone, and iPad.Messages also supports traditional instant messaging services like AIM, Yahoo! Google Talk and Jabber.With iMessage, you can start a conversation on your Mac and pick it up on your iPhone or iPad.Send messages from your Mac to friends with an iPhone, iPad, or Mac.And with iCloud built-in, it's simple to keep all your mail, contacts, calendars, reminders, notes, to-do lists, music, photos, iWork files, PDFs, and more up to date across all your devices. Play head to head games on your Mac with friends on their Macs or iOS devices with Game Center. With Notes, you can write down all your ideas and even speak your words with voice dictation. With the Reminders app, you can create to-do lists and alerts that appear in the new Notification Center. The new Share button makes it easy to share files, Web pages, photos, and videos, as well as tweet right from the app you are using. With the new Messages app, you can send text, photos, videos, contacts, Web links, and documents to anyone using another Mac, iPhone, iPad, or iPod touch - you can even start a conversation on one device and continue it on another. Mountain Lion includes over 200 new features to update your Mac into the best computing experience yet. Apple OS X Mountain Lion is the latest release of the world's most advanced desktop operating system.

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