Hi, I have got the following setup: 11" MacBook Air 2013 with 802.11ac WLAN and 13" Retina MacBook Pro 2014 with 802.11ac WLAN both connected with an Airport Extreme which is the latest model with 802.11ac WLAN. Software is up to date on all devices (including the Airport Extreme). Here is the kicker: I only get around 24 Megabyte/s transfer speeds between the Macs. I have selected 5GHz 802.11ac and both Macs are connected to the Airport Extreme and all devices are in the same room. Do you have any idea why it is so slow?