The 10.4.8 Server Update is recommended for all servers and includes fixes for the operating system and various applications, services and technologies. Note: The Mac OS X 10.4.8 Update (for client Macs) also includes fixes for the AFP client software. Apple recommends installing this update on client machines in conjunction with updating Mac OS X Server.
There are two ways to update to Mac OS X Server 10.4.8: Use Software Update or install from a standalone installer.
Software Update Installation
Software Update may have referred you to this document. For more information on this feature, see "How to Update Your Software."
Because some updates are prerequisites for others, you may need to use Software Update more than once to get all available updates.
Note: This version of Mac OS X Server is built as a multi-package and should not be used with Software Update's "Download Only" and "Install and Keep Package" options. If you need to save these packages for later use, try the manual update instead.
Standalone Installer
A standalone installer is also available from Apple Downloads.
Remote Installation
If you need to install the update on a remote computer, you can do so using the softwareupdate command-line tool.
This update delivers many fixes. Because this is a combo update, it includes fixes delivered with the Mac OS X Server 10.4.8 delta update as well as these previous Mac OS X Server 10.4.x updates: 10.4.1, 10.4.2, 10.4.3, 10.4.4, 10.4.5, 10.4.6, and 10.4.7.