sh: /usr/bin/lockfile: No such file or directory (127)
I recently upgraded to El Capitan version 10.11. I put my Mac Pro, the black barrel, to sleep every night. In the morning, for the last few days, I find a window with the above message, and the option to click "OK". What is trying to find this file or directory, and how can I keep this window from popping up?
None of the Categories below this window on this page apply. Apparently it has something to do with Mail.