Can't Log in to Public WiFi with Mac
I have never had trouble connecting to public networks with my MacBook Pro until a few days ago. I select a network and the Join "network name" login dialog appears but instead of presenting the network authentication page, it is empty and a sheet appears with the error message: The Webpage couldn't be loaded. I have tried many times on several public networks since this behavior began and it never works. I have to open up a browser to connect so I think that the hardware is OK.
What is causing this behavior? How do I fix the problem?
(My software is up to date. I already deleted the WiFi files that determine the preferences in the Network pane in system preferences but it didn't help.)
Thanks!