Apple MacBook Sierra Wireless WIFI 5GHZ
MacBook running HighSierra in wireless 5Ghz very instable in access-points 3825, 3805, 3912 with controller C25 running v10.31.04 ou v10.31.04. After a week of testes the best solution is: Disable 5Ghz and use the 2.4Ghz interface Only