iCloud integration Pictures - CBS News This is an early OS developer preview of Apple's Mac OS X 10.8 Mountain Lion. We got a chance to check out some of the new features so you can get a quick tour of Apple's latest big cat OS in this slideshow. Mountain Lion will be Apple's first major OS release since iCloud came into play. Now everything from setting up a new Mac to syncing your info across iOS devices and Mac computers becomes possible when you log in with your Apple ID. Credit: Screenshot by Kent German/CNET