What to do if your Mac isn't connected to WiFi

First step, restart the Mac wireless card

Click on the Wireless network icon at the top of the desktop, click "Turn off Wi-Fi" in the drop-down menu, and then use the same method, click "Wi-Fi: Open" in the dropdown, and restart the wireless card

Step two, restart the router

Long time to open the router, it is possible to cause the router overheating, you can try to shut down the router, static for a period of time, and then switch on the router power, may be resolved.

Step three, restart the system

If the problem persists, restart the system and try it out, maybe the problem can be solved.

Fourth step, delete useless wireless network

Because the wireless network signal in the same frequency band, also may cause the Mac to not connect the WiFi question, at this time, we can remove the useless WiFi way, solves this problem

Step one, click on the top wireless network icon, drop-down menu, select "Open Network Preferences"

Step two, in Network preferences, go to the "advanced" option.

Step three, select the other useless WiFi name, click "-" to delete the useless network.