Cubase and steinberg hub

Hi, I need help. Does anybody know why when i use mi sound system without using cubase it works very good but when i start using cubase i can only listen music with de sound system integrated in mac?
I have steinberg UR22mkII with Imac and my sound system are two studio monitor Yamaha HS7. THANK YOU AND SORRY FOR MY ENGLISH

Hi and welcome,

Please change the thread name, as far as I understand, your issue has nothing to do with the Steinberg Hub.

Do I understand you right, when you start Cubase, it plays back through your Built-in Output? If yes, go to Studio > Studio Setup > VST Audio System and choose the Yamaha Steinberg USB ASIO driver here, in Cubase, please.