How To Add a Login Message to Mac Using Terminal or System Preferences How To Add a Login Message to Mac Using Terminal or System Preferences February 19, 2018 5 Min Read 0 7 February 19, 2018 5 Min Read 0 7 It’s not a well-kept mystery, but few mac customers appear to recognize that they can modify the default mac login window to consist of a message Mac Wikitechy Editor Continue Reading