Hardware and software made for each other.
Since the software built into 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. It works with the Multi-Touch trackpad in Mac notebooks so they feel natural to use. Power Nap takes advantage of the Mac hardware to keep the entire system up to date while it sleeps.1 And OS X gives you long battery life by working with the computer’s built-in sensors to dim the screen in low-light conditions, and even regulating processor activity between keystrokes.Multi-Touch, Mac style.
Use your fingers to tap, scroll, pinch and swipe your way round the Mac. Because Apple makes both the hardware and software, Multi-Touch gestures are remarkably precise. This precision makes Multi-Touch the most natural and intuitive way to use a computer. When you scroll down on your trackpad or Magic Mouse, your document scrolls down. When you scroll up, your web page scrolls up. When you swipe left, your photos move left. These and many more gestures make all you do on your Mac easier, intuitive and fun
7