OS X 10.8 Mountain Lion, is now available for download from the Mac App Store. it will cost $19.99 in the US and £13.99 in the UK.
The release note states:
OS X Mountain Lion is the latest release of the world’s most advanced desktop operating system. Mountain Lion includes over 200 new features to update your Mac into the best computing experience yet. 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. The new Share button makes it easy to share files, web pages, photos and videos, as well as tweet straight from the app you’re using. With the Reminders app, you can create to-do lists and alerts that appear in the new Notification Center. With Notes, you can write down all your ideas and even speak your words with Voice Dictation. Play head-to-head games on your Mac with friends on their Macs or iOS devices with Game Center. 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
Messages
• Send messages from your Mac to friends with an iPhone, iPad or Mac.
• With iMessage, you can start a conversation on your Mac and pick it up on your iPhone or iPad.
• Messages also supports traditional instant messaging services like AIM, Yahoo!, Google Talk and Jabber.
iCloud
• Documents in the Cloud lets you create and edit your documents on your Mac, iPhone and iPad.
• The new Reminders app makes managing tasks easy. Jot down your thoughts with the new Notes app. And iCloud keeps your Reminders and Notes up to date across all your devices.
Safari
• Type both searches and web addresses in the new Smart Search Field.
• Pinch to see tabs with Tab View and swipe to switch between them.
• iCloud Tabs makes the last websites you looked at accessible on your iPhone, iPad and Mac.*
Notification Center
• New notifications appear in the top-right corner of your screen.
• Open Notification Center from anywhere in OS X to see recent notifications.
• Configure your notifications to receive just the ones you want.
Sharing
• Share links, photos, videos and other files straight from the app you’re in.
• Share with Mail, Messages and AirDrop.
• Sign in to Twitter, Flickr and Vimeo once to start sharing.
• Tweet straight from your apps with the Tweet sheet.
Game Center
• Play live multiplayer and turn-based games against friends on iPhone, iPad, iPod touch or Mac.
• Log in to the Game Center app to see friends in your gaming network.
• Check out leaderboards and achievements.
• See what games your friends play and track your progress against them.
Other great Mountain Lion features
• Dictation lets you talk anywhere you can type — no setup or training required.
• AirPlay Mirroring shows your Mac screen on your HDTV with Apple TV.
• Power Nap keeps your Mac up to date while it sleeps so it’s instantly ready to go.
• Gatekeeper makes it safer to download apps from the Internet by giving you control over which apps can be installed on your Mac.
• New features for Chinese users include improved text input, leading search engine Baidu as an option in Safari, sharing to microblogging service Sina Weibo and video websites Youku and Tudou, eight new fonts and a new Chinese dictionary.
Source: Apple
