Why does my iMac say Messenger is in use when I try to replace it?
I downloaded the newest Messenger app to the desktop of my iMac. When I drop the icon for the new version into my app window, it says this can't be done because "Messenger is in use." What am i doing wrong? Thank you!
[Re-Titled by Moderator]
iMac 27″ 5K, macOS 13.7