“Wi-Fi is essential to most Mac users, but what happens when your network gets sketchy? Apple’s hidden Wi-Fi Diagnostics tool should help you improve Wi-Fi performance,” Jonny Evans writes for Computerworld.
“To access Wi-Fi Diagnostics Option-click on the Wi-Fi icon in your Menu bar. In the drop-down menu that appears select ‘Open Wireless Diagnostics,'” Evans writes. “The Wi-Fi Diagnostics app is hidden inside /System/Library/CoreServices/Applications, from where you can drag the app icon to make it easily available in your Dock.”
“When you launch the app a screen appears to tell you what the tool does and asks you to let it run tests to determine the state of your current Wi-Fi connection, these can take a few minutes to complete,” Evans writes. “The first thing to check is what channel your network is on in comparison with other networks in your area. If you find you are sharing a channel with others it helps to change the channel on your router to one the other networks aren’t using — using a clear channel usually improves reception quality.”
Much more in the full article – recommended for anyone who uses Wi-Fi – here.