Question / Help Fullscreen Projector Preview

GFC Media

New Member
I am OBS on an iMAC to record and Livestream our church services. I need to have the Fullscreen Projector Preview to show up on our foyer TVs. When I select the Fullscreen Projector (Program) option, I select my secondary monitor listed. When I do this, my main monitor goes black and I cannot see anything. Is there a setting I have missed either in my Apple settings or in OBS that would cause the main screen to go black?
 
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