Apple Mac OS X Server (Version 10.6 Snow Leopard) - Manual (Page 107)

Chapter 5 Installation and Deployment 107
Upgrading a Computer from Mac OS X to Mac OS X Server
This is not supported in Mac OS X Server v10.6. Perform a clean installation instead.
How to Keep Current
After you’ve set up your server, you’ll want to update it when Apple releases server
software updates.
There are several ways to access update releases of Mac OS X Server:
In Server Admin, select a server in the Servers list, then click the Server Updates Â
button.
Note: The Server Updates button refers only to updates for the server’s operating
system software from Apple. Third-party software is not updated when used.
Additionally, it does not control software updates hosted in the Software Update
service.
Use the Software Update pane of System Preferences, if you are logged locally into
Â
the server.
Use the
 softwareupdate command-line tool.
Download a disk image of the software update from: Â
www.apple.com/support/downloads