Mac Mini ver 10.14.2 iMac ver 10.13.6 Cleared out a lot of cookies on both and things are better. Did not dump all cookies because I have had some bad luck in the past doing this. Problem is mostly with Yahoo mail. Some problems on browser. Exit and return and problem goes away for awhile. Also have gmail which I don't use much so I can't comment on it the same with Apple mail. Browser is Safari.
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