How to Fix Macbook Wifi Connection
This solution assumes that you already tried Network Diagnostic (Open System Preferences->Assist Me->Diagnostics) solution but still f...

There are many common connection problems like security type incompatibility, distance of your macbook to your device, etc. But in my case the problem was the DNS. I'm always using google dns: 8.8.8.8 and 8.8.4.4, but it failed me. So what I did was use another DNS provider (OpenDNS) 206.67.222.220.
Here's how:
- Open System Preferences
- Select Network
- Click Advanced and open the DNS tab.
- Add Open DNS and click Ok.
5.) Turn wifi off and then on and try to connect.
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