Start by running this tool: Hold down the Option key ( Alt on some Mac keyboards) and select the Wi-Fi icon in the upper-right corner of your screen. Modern versions of MacOS (since around Mountain Lion times) have a diagnostic tool built in to check the wireless network. Take a look and find the solutions that fit your problem. Here’s a guide on what to do to get your MacBook back on the network quickly and fix what went wrong. We know you want to get back online right away, whether it’s to turn in an important report or catch up on the latest streaming episode.
Since Wi-Fi is a vital part of today’s MacBook experience, connection problems are serious business.
