Michael CorganMy wife's MacBook Air, running High Sierra, has a problem with Mail. It would not respond when she was trying to forward an email. Re-starting the Macbook and trying to launch the app got the message "You can't open the application "Mail" because it is not responding".
One suggestion on line was to restart and then try to launch the app holding down the Shift key, but that didn't work. Another suggestion was to type Mail into Spotlight but this got the response "The application "Mail" is not open any more"
Has anybody had experience with this problem? Or more importantly, found a solution!