OS X Lion is the next major release of the Mac operating system and includes over 250 new features that will transform how you interact with your Mac. Tap, swipe, and scroll your way through your apps using fluid Multi-Touch gestures. Full-screen apps take advantage of every pixel of your display. Mission Control gives you a birds-eye view of everything running on your Mac and makes it easy to navigate anywhere with a click. Launchpad gives you instant access to all the apps on your Mac. And a completely redesigned Mail app features powerful new search capabilities and groups messages into Conversations.To upgrade your Mac to OS X Lion, you must be running OS X Snow Leopard. If you have OS X v10.5 Leopard, purchase OS X v10.6 Snow Leopard now and install it on your Mac. System Requirements:    Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor    2GB of memory    OS X v10.6.6 or later (v10.6.8 recommended)    7GB of available space    Some features require an Apple ID; terms apply.    Some features require apps developed to work with Lion.    Gestures require a Multi-Touch trackpad or Magic Mouse.    Some gestures are not available on Magic MouseOnly available in OEM packaging