Djay on macbook regarding headphone next song always goes out on speakers?

Good Morning, My Name is Dj Stand connecting My Macbook to my unmark deck quad using Djay can’t used my headphone for the next song it always goes out on my speakers i wonder if there is a setting to stop for been happening in the future please answer …

Please make sure the Numark Mixdeck Quad is selected as Pre-Cueing Output at Preferences > “Devices”.
Also, at the upper bar of djay Pro, there’s the headphones icon. After selecting it, a pop-up appears you can use to assign all of your Pre-Cueing settings.