Symptom
Mac OS X 10.0 to 10.0.4
and 10.2 and later:
If you try to use the Software Update control panel within the Classic environment, an alert box appears with this message:
"That application or control panel is not supported by Classic."
Mac OS X 10.1 to 10.1.5:
The Software Update control panel opens within the Classic environment. It reports that your software is up to date, but that is not necessarily accurate.
Solution
Restart the computer from Mac OS 9 to use the Software Update control panel. After updating your software, switch the startup System Folder back to Mac OS X. For more information about changing the startup operating system, see article 106667, "
How to Switch Between Mac OS 9 and Mac OS X".