I’ve been having trouble getting Apple Mail to quit. It wouldn’t do it unless I force quit. I called Apple tech support and they had me drag the SpamSieve plugin for Apple mail to the trash and empty the trash. Mail now quits ok. What’s up with that?
It would be helpful if you could open the Activity Monitor program and select Mail in the list. After telling Mail to quit, choose Sample Process from the View menu. Then save the resulting data to a file and send it to me.