presonus studiolive 32 and multiple displays

having an issue running multiple displays (laptop plus 2 monitors from hdmi to usb adaptor) as well as my Presonus StudioLive 32 digital mixing board...either the computer locks up, the monitors freeze black, or the board locks up...do I just not have enough computing power? Using a MacBook Pro (retina, 15 inch, mid 2015) with 2.5 ghz intel core i7, 16 gb 1600 mhz ddr3, and an intel iris pro 1536 mb.

Thanks for any suggestions..

btw, all worked fine together until the MacOS High Sierra update...since update, will not work...updated all drivers.