Leopard Guides

Leopard, also known as Mac OS X Leopard, is the current release version of Apple's Mac OS X operating system that runs on the company's Macintosh computers.  Leopard was released on October 26, 2007.  Leopard has been designated a version number of 10.5 and is the 6th version OS X version that Apple has released since early 2001. Leopard contains more that 300 new features when compared to Tiger, the prior version of Mac OS X.
This guide will describe the process of upgrading to Mac OS X Leopard.  This guide will describe at a high level the step involved in a Mac OS X upgrade.  If this will be your first ever Mac OS X upgrade, you'll want to pay close attention.  Before we get started, we'd like to point out that you will want to verify the system requirements as outlined by Apple.  If you have a recent Mac, you'll shouldn't have any problems upgrading to Leopard.
Recent Mac purchasers who have purchased a qualifying new Mac or Apple Certified Refurbished Mac (see models below) on or after October 1, 2007 that has Mac OS X Tiger installed can upgrade to Leopard for free.  Apple is offering the upgrade as part of the Mac OS X Leopard Up-to-Date Program.  The qualifying Mac models are as follows:
If you want to manually check for Mac OS X and/or application updates for a  Mac running Mac OS X Leopard, you can launch Software Update.  For the most part, Software Update on Mac OS X Leopard works in much the same way as it does on Mac OS X Tiger.
One of the new features in Software Update starting with Mac OS X Leopard is that it can download important updates in the background without your intervention.  When the updates have finished downloading, Mac OS X will notify you that new updates are ready to be installed.  If you do not want to use this feature or prefer to run Software Update manually, use the following steps to disable the feature.