Introduces over 300 new and enhanced features to OS X, including a new desktop and updated finder enabling easy browsing and sharing between multiple Macs
Take advantage of the latest developments in processor hardware with full native 64-bit support, multi-core optimization, and new Core animation
Preview files without opening an application using Quick Look
Easily and automatically back up and restore lost files or a complete Mac with Time Machine
Create groups of applications and instantly switch between them with Spaces

The Mac OS X Leopard Family Pack is a single-residence, five-user license
Introduces more than 300 new and enhanced features to OS X, including a new desktop and updated finder enabling easy browsing and sharing between multiple Macs
Preview files without opening an application using Quick Look
Easily and automatically back up and restore lost files or a complete Mac with Time Machine
Take advantage of the latest developments in processor hardware with full native 64-bit support, multi-core optimization, and new Core animation