AirPort Base Station (Dual Ethernet): Mac OS 9 AirPort Admin Utility Does Not Work After Updating to AirPort 2.0.4

After configuring an AirPort Base Station (Dual Ethernet) with AirPort 2.0.4 in Mac OS X, you are no longer able to configure that base station from Mac OS 9. This is normal behavior.
Symptom

Once an AirPort Base Station (Dual Ethernet) has been configured using the AirPort 2.0.4 in Mac OS X, you can no longer configure that base station from Mac OS 9. If you attempt to do so, an alert box with this message appears:




Figure 1 AirPort Admin Utility alert message


Solution

AirPort 2.0.4 includes features that are only available when configuring the AirPort Base Station (Dual Ethernet) using the AirPort Admin Utility in Mac OS X.

Attempting to administer an updated base station from Mac OS 9 could lead to unpredictable results. For that reason, AirPort Admin Utility access from Mac OS 9 has been disabled for any base station that has been configured from AirPort 2.0.4 in Mac OS X.

You should use the most recent version of the Mac OS X AirPort Admin Utility to set up an updated base station.
Published Date: Feb 18, 2012