Chosen Solution
I think I need a new Airport/bluetooth board but open to suggestions. My computer won’t connect to the 5ghz wifi but it will connect to the 2.4 ghz wifi. I have a MacBook pro mid 2012 13inch unibody: 2.5 GHz Dual-Core Intel Core i5 If it does need a new Airport/bluetooth board, do I buy the bluetooth 2.1 or 4.0?
The issue is related to the router 5G selected channel. If you set th Channel selection to “Auto”, perhaps it will select a channel which is not supported by your MacBook Pro Wireless Card. You have to run the “System Information“ on you Macbook and select the “wi-fi“ section under the “Network“ part. You then will see the “Supported Channels”. In my case, i found: Supported PHY Modes: 802.11 a/b/g/nSupported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48 You can download an app on your mobile in order to check wich channel was selected by your router, and i’m quite sure, you won’t find it on the list. In order to solve this issue, you have to access the Router Configuration and select a fixed channel supported by your MacBook such as 36 or similar.
I think you’re facing a dual AP config issue. I have two routers and they are both named the same ACME each has a different password so when you try to connect you are facing a crapshoot on which one responds first! Was that the 2.4 GHz ACME or the 5.0 GHz ACME. You can also get into trouble with just one AP which offers both 2.4 GHz and 5.0 GHz bands! Your system caches the connection and when if failed to connect to the given AP’s band it can fool you as both bands are named ACME! I recommend renaming the AP bands the 2.4 GHz ACME_2-4 and 5.0 GHz ACME_5-0 So the cache then has distinction of the connected AP band. So to fix this you’ll need to open up your WiFi settings (unlock your settings first) > Advanced, then delete your entries, save your settings and reboot your system you’ll then need to log back into your WiFi network (make sure you still remember the password) If you do have this setup I’ll assume your location is too big for a single AP. What you need is a mesh setup that way you have a single AP login to any AP under your control.
