Mac OS X 10.5 Leopard Essential Training With the release of the Leopard operating system for Macs, Apple has added or updated more than 300 features. In Mac OS X 10.5 Leopard Essential Training, Macworld senior editor Christopher Breen explores each of Leopard's vital features. He walks viewers through the installation, then goes over how to use the interface and navigational elements, work with the Dock's stacking feature, and take adv