My MacBook won’t connect to wifi
How can I connect my Mac book to wifi
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Is your MacBook having trouble connecting to a particular Wi-Fi network, or any Wi-Fi network? Which exact model is your MacBook Air, and what version of macOS is it running?
What have you tried, so far yourself, to resolve this so that we don't offer you potential solutions that may not have already worked for you?
Ref:
- Connect to the internet with your Mac - Apple Support
- If your Mac doesn't connect to the Internet over Wi-Fi - Apple Support