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Q: MacBook Air regularly won't detect any networks
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Apr 8, 2016 12:59 PMby norm123,Hello Anna,
I understand that you are having intermittent issues with connecting to Wi-Fi networks on your MacBook Air. Let's see if we can get this sorted out.
The first place to start is by using Wireless Diagnostics. This will help identify any settings that need to be changed or potential issues with the network that you have already joined. Take a look at the article below for more details to help you out.
Use Wireless Diagnostics to help you resolve Wi-Fi issues on your Mac
https://support.apple.com/en-us/HT202663
Take care
