My mcx8000 won't play with serato on my MacBook 2016. It connects but no output

I can run my controller with engine but as soon as I plug in my mac, it connects, but I can’t push play. Also my computer reads the midi controller just had no output signal or options to make so happen. Someone help please

The MCX-8000 needs Serato DJ to run when connected to a computer. You cannot connect your computer and us it as as an output by itself.