Several websites have a preview up of Apple's next Mac OS X release - it's called Mountain Lion, and continues the trend of bringing over functionality from iOS to Mac OS X.



From OSNews:

Well, this is a surprise. Several websites have a preview up of Apple's next Mac OS X release - it's called Mountain Lion, and continues the trend of bringing over functionality from iOS to Mac OS X. Lots of cool stuff in here we've all seen before on iPhones and iPads, including one very, very controversial feature: Gatekeeper. Starting with Mac OS X 10.8, Apple's desktop operating system will be restricted to Mac App Store and Apple-signed applications by default (with an opt-out switch), following in Windows 8's footsteps.
Several large websites, such as Engadget and The Verge, have published previews of Apple's next big Mac OS X release. Mountain Lion brings yet another load of iOS features to desktops and laptops, in the continuing drive to unify Mac OS X and iOS. Let's start with the most controversial feature.

  Mac OS X 10.8 Mountain Lion restricted to App Store, signed apps