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Troubleshoot joining a Wi-Fi network on Mac
Here are some things to check if you’re having trouble connecting to a Wi-Fi network.
If the network is protected with a password, make sure you know the correct password and the type of wireless security for the network.
If you’re joining a hidden network (a network with its name hidden), make sure you have entered the network name and password correctly. See Join a hidden Wi-Fi network.
If the network is secured by access control, make sure your computer’s MAC address is registered with the network administrator.
Make sure you’re in range of the network you want to join. The typical range of a wireless network is 150 feet, but range may vary based on the environment.