Leopard - Mac OS X 10.5
Use Migration Assistant to Copy Data from a Previous Volume
Migration Assistant makes it easy to migrate user account data, home directories, applications, files, and computer settings from your old version of OS X to your latest installation of Leopard.
Installing OS X 10.5 Leopard - Archive and Install Method
Installing OS X 10.5 Leopard using the Archive and Install method lets you create a clean, fresh install without giving up the ability to access your older system folder, should you ever need any of your old data.
Installing OS X 10.5 Leopard - Upgrading to OS X 10.5 Leopard
Installing OS X 10.5 Leopard using the upgrade method allows you to preserve all of your existing user data, account information, and network and system settings, and still enjoy all of Leopards new features.
Installing OS X 10.5 Leopard - Erase and Install Method for OS X 10.5
Installing OS X 10.5 Leopard using the Erase and Install method gives you the ability to create a clean, fresh install with no leftover debris from any previous OS you may have had installed.
Keep Your Desktop Clean or Risk Getting Bogged Down
Live Preview, Leopard's newest feature, displays thumbnail images of a file's contents. This can cause severe slowdown if your desktop is cluttered.
Apple Offers New Goodies in Leopard System
New York Times columnist David Pogue looks at the new features of the latest Apple cat.
Mac OS X v10.5 Installation and Setup Manuals
Need a manual for Leopard? Apple keeps copies of the Leopard manuals online. You can download these manuals to replace lost copies, or use them to get ready for an OS upgrade.
Not sure if your current Mac can run OS X 10.5? Apple maintains the specifications for Leopard online, including general Mac requirements.
Mac OS X 10.5.x Updates for All Macs
Although I normally recommend using the built-in Software Update feature to update OS X, there are times when you may want to download and install a software update manually. You'll find the most recent Leopard updates here.