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Mac OS X Lion is the next major release of OS X, the world’s most advanced desktop operating system.

Hardware and software made for each other.

Since the software on every Mac is created by the same company that makes the Mac, you get a fully integrated system in which everything works together perfectly. OS X works with the processor in your Mac to deliver the best possible performance. The Multi-Touch trackpad on every Mac notebook gives you more than enough space to pinch, swipe, and tap your way around most of the apps on your system. OS X gives you long battery life by dimming the screen in low-light conditions and even regulating processor activity between keystrokes.

Mac OS X Lion includes over 250 new features that will transform how you interact with your Mac.

Top 10 features:
1. Multi-touch gestures – Use the multi-touch gestures to dynamically and efficiently scroll, zoom, browse through Safari, photos and other files (no more back or forward buttons, just swipe)
2. Full screen applications – Safari, Garage Band, iPhoto, and all standard Apple apps to be full screen
3. Mission control – A unified view of Expose, Spaces and widgets that can be accessed by a three-finger swipe
4. Mac App store – Taking the purchase of apps to another level with the App store built in to the Lion OS, customizable notifications and updates
5. Launchpad – Have all your newly purchased or downloaded apps neatly organized in the desktop at the tip of your fingers at a pinch’s gesture
6. Resume – Go back to where you were when you quit an application, document or just about anything or go back where you were even after you restart your system. Not grandiose but time-saving, definitely.
7. Autosave for documents – You can “revert to the last opened file” or “lock” it so that it won’t be changed. One click on “duplicate” and you’re there. Nice.
8. Versions – Autosave won’t save over the previously saved file, but will create versions of it so that you may browse through previous drafts. The best part, all is automatic.
9. Email – Better view-ability, better applicability, and better search capabilities (multi-faceted searches according to person, subject or period)

Find, organize, and share files fast.

The Finder gives you easy access to all the files on your system. It lets you find, organize, and access practically everything on your Mac — including applications, files, folders, discs, and shared computers on your network. You can sort files by kind, application, date modified, date added, or size. But with so many files on your computer, finding a specific one can be a challenge. Not on a Mac. Features like Spotlight and Quick Look make locating the file you’re looking for effortless — even if you don’t know the filename. Say you’re searching for a document, and the only thing you recall about it is the phrase “surrealist painters.” Open Spotlight, start typing “surrealist painters,” and your Mac generates a list of files that contain those words. And with Quick Look, you don’t need to open an application to verify that you’ve found the right file — view a full-screen preview by hitting the space bar. Want to share a file with someone nearby? Just drag and drop to send it to the person wirelessly with AirDrop.

See everything running on your Mac. In an instant.

OS X offers systemwide support for gorgeous, full-screen apps that use every inch of your Mac display. You can have multiple full-screen apps open at once — along with multiple apps in windows. And it’s easy to switch between full-screen and desktop views. Mission Control gives you a bird’s-eye view of all your windows and full-screen apps, and allows you to instantly navigate among them.