AirPort: Use the Same Software Version on All AirPort Devices

For best performance, you should use the latest version of AirPort software on all AirPort-equipped computers and AirPort Base Stations.
Symptom

Solution

For best performance, you should be sure that all AirPort-equipped computers and AirPort Base Stations have:
Mixing different versions of AirPort software among the computers or base stations on your network may cause unexpected results. For example, an AirPort 1.1 client using the AirPort Setup Assistant cannot detect a Base Station using a later version of the AirPort software.

You can download the latest version of AirPort software at Apple Software Updates (http://www.apple.com/swupdates/).

Note: As a workaround in the Computer-to-Computer example, you may start the network with a computer using AirPort 1.3 and then have computers using AirPort 1.2 join.

Note: Wireless Internet access requires an Internet service provider (fees may apply) and AirPort (or AirPort-compatible) wireless Ethernet card and base station. Some ISPs are not compatible with AirPort. For more information, see technical document 106590: "AirPort: Requirements for Wireless Internet Access"
Published Date: Feb 20, 2012