I bought a new MacBook Air and was able to connect to the internet at first but now it won't connect. I have other devices as well as other computers on wifi but my Mac won't connect. When I try and click on the wifi, it tells me that it can't be joined.

How can I troubleshoot?


Option click the wifi icon in the menu bar and select Wireless Diagnostics.

Follow the instructions and post a second question if you get stuck with a specific step or can't narrow down the issue.

Also, carefully read the help guide on how to be specific and show how your research such as what version of OS X and what router is not working as expected.

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