Symptom
When you try to use the Software Update feature of System Preferences, "Mac OS X Server 10.1.3" installation will not start.
Sometimes this is related to the file "Info-macos.plist" in the Apache.rasplug package.
Solution
You may temporarily avoid the issue in some cases by using a standalone installer of the software. But to permanently resolve the issue and prevent recurrence,, you should delete the file "Info-macos.plist". Follow these steps:
1. Open Terminal (Applications/Utilities/).
2. At the prompt, type:
sudo rm /System/Library/ServerAdmin/Apache.rasplug/Contents/Info-macos.plist
3. Press Return.
4. Enter an Admin user password when prompted, then press Return again.
5. Quit Terminal.