A number of customers who recently bought a Mac and are looking to upgrade to Mountain Lion through Apple's OS X Up-to-Date program have been met with error messages telling them their redemption code has already been used.
Along with Wednesday's release of OS X 10.8 Mountain Lion, Apple released Mountain Lion Server as a $19.99 upgrade on the Mac App Store, while Xcode 4.4 was also provided to developers, and Apple Remote Desktop also received an update.
In OS X Mountain Lion, iCloud begins to take shape as the smart, automated way to store documents on a per-app, device independent basis, incrementally displacing the local file system that non-technical users have long struggled to comprehend and replacing it with a cloud-based service that connects and synchronizes desktop and mobile devices via the Internet.
In OS X Mountain Lion, Apple is radically improving the layout of Universal Access features for users who are sight, hearing or motor impaired, and changing the name of its portfolio of features to match iOS: "Accessibility."
Apple is expanding Game Center from an iOS play into the Mac arena with OS X Mountain Lion, enabling developers to add friend requests, recommendations and challenges as well as unlockable achievements and top score listings.
AirPlay, Apple's wireless audio and video distribution system, gets an update in OS X Mountain Lion, offering modern Macs with compatible hardware the ability to wirelessly mirror the screen to an Apple TV-attached HDTV display.
In Mountain Lion, Macs are getting system-wide speech recognition, the same "Dictation" feature Apple gave the new iPad at the beginning of the year. While it works well, it does require a network connection.
Safari turns 6 in this summer's release of OS X Mountain Lion, offering a new view of open tabs similar to iPad and a new iCloud tab-sharing feature, along with an offline Reading List, new website passwords browser, new privacy settings, and a feature that allows websites to send alerts to the new Notification Center.
The new Notification Center service of OS X Mountain Lion, a feature borrowed from iOS, goes beyond its mobile sibling to offer a direct way to send tweets from the desktop. It does not however have iOS 5's live ticker updates for widgets such as Weather and Stocks, something OS X presents in Dashboard instead.
Apple on Monday seeded what is intended to be the final test version of its OS X 10.8 Mountain Lion to developers with no known issues, meaning that the next-generation operating system is all but complete and set for imminent launch.