communicating with controller

having problems with controller communicating with program. I am using mac book pro and unmark mix deck quad. It will work for a few minutes during a mix and then with not respond to the controller movements or actions

This sounds like a hardware problem usually caused by:

* broken USB cable → try using a different USB cable
* broken USB port → try using a different USB port on your Mac

If none of the above helps, then please kindly contact Numark support directly to get your controller checked: