Mountain Lion Mac operating system goes on sale

An attendee looks at the new MacBook Pro on display at the Apple Developers Conference in San Francisco, Monday, June 11, 2012. New iPhone and Mac software and updated Mac computers were among the highlights Monday at Apple Inc.'s annual conference for software developers. (Paul Sakuma)

July 25, 2012 12:40:25 AM PDT
Apple Inc. will release its new operating system for Mac computers on Wednesday, with features borrowed from mobile devices and a tighter integration with online file storage.