Apple released OS X 10.8 on Wednesday 25 July after development of one year .available in the Mac app store. if already have Snow Leopard or Lion , you can upgrade at price of $19.99.
whats new :
- Great iCloud integration, Messages, and social sharing, brand new Notification Center
- New Messages app, which replaces iChat® and brings iMessage to the Mac
- Social sharing 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 .
- Game Center, which brings the popular social gaming network from iOS to the Mac
- Dictation, which allows you to dictate text anywhere you can type
- see all 200 new changes >>
you can upgrade from here : http://itunes.apple.com/us/app/os-x-mountain-lion/id537386512?ls=1&mt;=12
enjoy mountain lion