Mac OS X 10.2.3 Jaguar Unlimited allows unlimited clients access and is a different breed of operating system. Jaguar combines the rock-solid reliability of UNIX with the ease of use of Macintosh. This version of Mac OS X is as innovative as the computers that run it. And whether you're a Mac user who's upgrading, a Windows user who's looking at switching to the Mac or a UNIX user who loves the idea of using key applications like Microsoft Office on top of a state-of-the art BSD UNIX implementation, this is the OS for you. Mac OS X v10.2 is loaded with over 150 compelling new features like an instant messaging client that is compatible with AOL, an enhanced Mail application that lets you filter out junk mail, an address book that is an activity center for all your contacts, and a full-featured search engine so useful that you will soon feel lost without it. Mac OS X v10.2 also features QuickTime 6, the next-generation multimedia standard with support for MPEG-4 video. Part Number M8720Z/A.