Official comment
You're running High Sierra; please follow the instructions to disable the driver security and then run the driver installer a second time.
I want music master controller output, not from the mac speakers.
rekordbox dj can't see my xdj-rx as output. Others midi command works.
Mac Os 10.13.3 - Rekordbox dj 5.2.0 - XDJ-RX firmware 2.21
thank you

You're running High Sierra; please follow the instructions to disable the driver security and then run the driver installer a second time.
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@Daniele Rossi
Is your xdj rx set to midi mode??? Also have you watched this??? https://www.youtube.com/watch?v=OekYITRI7s4
yes is set in midi control.
maybe during installation I set my mac speakers as output, now i can't change.
maybe there's no cdj-rx driver for high sierra 10.13.3
i show you screen after watched your video.



@Daniele Rossi
Ciao! Senti nella finestra "dispositivi audio" prova ad agiungere un nuovo midi device come fa Pulse in questo video https://www.youtube.com/watch?v=DOEQh9mTppk . Vedi di avere acesa e colegata la xdj-rx mentre fai questi passi.
Scusa se non ho scritto corretamente in italiano.
in midi audio configuration Built in output is not available as you can see in the screen above
THANK YOU PULSE FOR YOUR SUPPORT
I have the same problem: I have a new macbook and unfortunately: no audio driver, please help
mac 10.14.6, all drivers updated, firmware also ok, ....no sound