I have had no problems with Safari until recently on my home Mac. The identical Mac at the office does not suffer this error messageAttempts to visit certain websites ( banks, etc.) produce the error:
Google returns articles and videos that suggest toggling settings or clearing caches (this does not work, nor did I expect it to), however, they do not provide for diagnosing the root cause of the problem with a procedure and a "litmus test" (observable evidence confirming root cause). An example:
Is there a procedure to diagnose confirm that there is not a problem with the version of Safari and that there is something I did to put Safari in its current state?