If the problem occurs with a home network, there may be a verification problem.
In airports, restaurants and other public places this is where this problem usually appears. This message usually appears when connecting to public WiFi networks or where many people are connected. If you click on this link you will be able to access more data to help you solve the problem. On other occasions, in these same places, a link appears in “More information”. Information is generally given from System Preferences> Network or with a different icon in the menu bar.
When there are problems establishing an internet connection via WiFi, the Mac itself tells you to. If you were able to connect, read this article to find other options.
In case you cannot access them either, contact your telephone company. In that case we also recommend trying to access through another device, either wired or with a WiFi network. If your internet connection does not work this way either, it is possible that the router is having problems. In case you have a MacBook without such a connector you will need an adapter. However, trying to connect your Mac in this way can help rule out other problems. Yes, we already know that this is not the best solution since if you want to connect to WiFi it is because it may not be really useful to do it by cable.