

Connect a VGA display or projector: Use a USB-C VGA Multiport Adapter to connect the display or projector to a Thunderbolt port on your MacBook Pro. Select Displays, then click Display Settings and select your monitor from the sidebar. For each display, securely connect a video cable (and adapter, if necessary) from a video output port on your Mac to the video input port on the display. You can connect an external display with up to 6K resolution at 60HZ.

Hold the keys (not the power button) for two whole "ding" cycles then let go and let it boot normally. If you don’t see your external display under the Display tab, press 3. Even connect an external display or two If you are using your Mac with an external screen and want to close the lid on your MacBook here's How to use MacBook with lid closed, stop How to connect a third monitor to a Mac. How do i force my macbook to use an external monitor.
