Today Apple has released firmware updates for its Wi-Fi base stations. This includes the AirPort Express, AirPort Extreme, and AirPort Time Capsule. Firmware 7.7.8 is available for 802.11ac base stations, while 7.6.8 is available for 802.11n base stations.
Apple’s release notes says that the update fixes an issue that prevented AirPort base stations from appearing in the AirPort Utility when Back to My Mac was enabled. The firmware updates can be installed by using the AirPort Utility app on iOS or macOS.
Even though Apple has stopped development on its AirPort wireless routers, with no new AirPort products planned for the future, the company is still continuing to provide bug fixes and updates.