Apple WWDC 2007 – Mac OS X Leopard Introduction
Mac OS X Leopard (version 10.5) is the sixth major release of Mac OS X, Apple’s desktop and server operating system for Macintosh computers. Leopard was released on 26 October 2007 as the successor of Tiger (version 10.4), and is available in two variants: a desktop version suitable for personal computers, and a server version, Mac OS X Server. Leopard was superseded by Snow Leopard (version 10.6). Leopard is the final version of Mac OS X to support the PowerPC architecture as Snow Leopard functions solely on Intel based Macs.
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