How to Change Message and Call Ringtones on OS XThis option is located in the FaceTime app, so you’ll need to change it there (even if you never actually use FaceTime). Changing the ringtone on your Mac will affect the sound you hear for both phone calls and FaceTime.To begin, first open FaceTime on your Mac, then open the preferences either by opening the FaceTime menu, or using Command+, on your keyboard.In the settings, you’ll see the Ringtone menu near the bottom of the panel.Click on it to…See More