Turning off Presenter View on MS Office Mac
Presenter View allows speakers to have notes on their screen while the projected image only shows the slide. If this feature is not desired, follow the following steps to turn it off:
Once PowerPoint is open select PowerPoint at top of screen
Choose Preferences
In the Output and Sharing pane, click Slide Show
Uncheck Always start Presenter View with 2 displays
This will turn off presenter view so that only the slide will appear on the screen as well as on the external display.