When the administrator of a wifi network changes the network password to something new, previously associated devices that have the old password saved will no longer be able to connect until they re-enter their wifi passwords.
Unfortunately OSX handles this situation in quite an unpredictable way:
Whatever happens seems to have to do with the network security protocol in use and also differ between vendors. Sometimes it will just fail silently, sometimes it pops up a "connection timed out" alert box, sometimes it seems to get stuck, forever animating the
Is it possible to force my MacBook to forget and/or bring back the network password entry dialogue?