This book will get you up to speed on OS X Mountain Lion in record time. It covers whats new, whats changed, and points out whats stayed the same so that you dont have to spend any time thinking about it. Learn how to use the new features, such as Notification Center, Game Center, Dictation, Gatekeeper, and Sharing as well as how to use the enhancements to existing applications, such as the new omnibar in Safari. See how Mountain Lion makes Contacts, Calendar, Notes, Reminders, and Messages on the Mac just like their counterparts on the iDevices. Apple advertises that Mountain Lion has a little over 200 changes, but thats counting absolutely everything, such as the fact that the kernel ASLR now randomly arranges kernel components at boot time. This book doesnt cover those kinds of changes - just the changes that have the most impact on a users day-to-day experience.