In Mac OS X Leopard in the world most advanced operating system is now even better. With more than 300 new features, Leopard is loaded with innovations - starting with the surprisingly trouble-free installation if you're upgrading your Mac. This has never been easier to find, organize and share all on your computer. Organize files in stacks, browse files with the cover flow, use a cursory glance to see the files without even opening them to go back in time to restore the old files with Time Machine, send e-mail with a personalized stationery, add effects to video chats and much more.