Master Output playing thru Macbook pro

When I play audio it's coming out of both my macbook and the loudspeakers. I do not want the music coming out of my macbook. When I go into Rekord Box Preferences - Audio - Output Channels - Master Output the only options are

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XDJ-RX3: MASTER + MacBook Pro Speakers

XDJ-RX3: Phones

I already Updated firmware, have the latest OS, and checked sound under mac system prefrences.