I have a MacBook Pro (Retina, 15-inch, Mid 2014) running on MacOS 10.14.3 (18D42) and since some time I have been unable to connect to any 5GHz WiFi networks while 2.4GHz networks from the same routers are ok.
I have tried several things to no avail:
- deleting the network in my wifi settings
- using three separate and different brand routers
- resetting SMC and NVRAM
- deleting settings in /Library/Preferences/SystemConfiguration/ directory
- made the 5GHz open without passwords
- Changed SSID names
The Macbook is able to see the network; however, when I try joining the network, and I enter the password I keep getting an error "the wi-fi network requires a WPA2 password".
Interestingly, I get the same error when the authentication method is set to "Open".
I am 100% sure that the password is correct as I've tried several times (also setting up the 5GHz on different routers). The networks are working (e.g. from my iPhone, Android phones).
Lastly, below are some of the details of the network setup in my Wi-Fi router.