In this lesson for Messages on the Mac, I show you how the general preferences for Messages on the Mac. These preferences include setting how long you want to keep messages, what happens when you close a conversation, notification options for when you receive a message from an unknot contact and if someone mentions your name in a message, sound options, and this is also where you can set the text size of your messages. See how this all works in my video on the general preferences for the Messages app on the Mac.