I have a late 2013 MacBook Pro, late 2013 iMac and a 2013 Time Capsule. I have the latest firmware and running the latest Airport Utility. I notice that whenever these computers sleep for a long time or get restarted/shutdown they come back online using 802.11n instead of 802.11ac. The only way I've been able to get them back on AC is to Turn Wi-fi Off and back On again manually. I originally thought this was because of my 802.11n devices pulling the network down but they are now on my older Time Capsule which is in bridge mode via ethernet and has a different network name. I have also deleted any previously known networks from both computers. Does anyone know of a way for me to do this "reset" automatically? Or even better, know how to avoid this problem in the first place?