Why isn’t Wi-Fi working?
Your Mac, iPad and iPhone should normally have very few problems connecting to your Wi‑Fi network, but when problems crop up, fixing them is relatively easy. The first thing to check, of course, is that Wi-Fi is activated on the device you’re using. On the Mac, look at the Wi-Fi icon in the menu bar – the bars that it’s comprised of indicate signal strength; the more darkened bars there are, the stronger the signal is. If you can’t see any bars, several are grey, or there’s an exclamation mark showing, Wi-Fi on your Mac is switched off, the signal from your router is weak, or you’re experiencing some other problem, respectively.
Click the icon for a list of nearby networks that are broadcasting their name. For additional info about the network you’re using, such as whether it can reach the internet and reception info including transmission rate, hold å when you click the icon. You can run a diagnostic from here, and generate a report for a pro to look at.
The Wi-Fi icon has an extra mode that reveals fine connection details.