Is it normal for my iMAC not to see my 5GHZ network when it is on a DFS channel (Channel 132 for 5.0ghz)? I am not using 2 separate SSID's, and I have 2.4 and 5.0 channels on AUTO. However, iMac, being 15 ft from the router, only sees and connects to the 2.4ghz band....when I load inssider, it doesn't show the 5.0 GHZ, because the auto channel is 132. I change to manual, and put 149, it see's it. So, 2015 iMac can't decipher DFS channels correctly?