Mac OS X 10.5 Leopard

Features

* 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