Network Problems
I'm having trouble connecting to my wifi. When I click on "Turn Wi-Fi On" it doesn't turn onand it's only blinking.
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Try going to System Preferences >> Network and moving your desired network connection to your Wifi Router Up to the Top of the listed connections.
If this does not work, in same place ( Network Connections ) remove the offending connection via the little minus sign. Restart computer and try adding it back.