Apple’s released Apple Base Station Extreme firmware update Version 7.2.1, which certifies the base station for the IEEE 802.11n Draft 2 specification. In their usual considerate and detailed explanation of what they’ve done, Apple says:
This update also includes bug fixes and security updates.
It requires that you have Airport Utility 5.1 or later, and, of course, a Base Station Extreme with 802.11n. Get the firmware update here.
