No specific info about version 5.5. Please visit the main page of AirPort Extreme Firmware Updater on Mac Informer.
Note: Most recent release available only within OS X 10.11 El Capitan update.
AirPort is a software supports the original Apple AirPort Graphite and Snow.
Changes the Mac address of an AirPort Extreme card.
Fixes the compatibility with Wi-Fi Protected Access.
Update your G3v2 G3X device firmware.
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