Cubase Elements8 on iMac connection to X32 Behringer


I have the following problem, running Cubase Elements 8 with my X32 connected via X-USB to my iMac it is not working despite all settings seems ok and green USB light on X32 is lid. If I connect with Reaper nor problem all functions OK and the same when I connect Cubase LE from my windows laptop.

Any suggestions why Cubase does not gibe any input or output while both other options work ?

iMac running El Capitan 10.11 and latest update from Steinberg installed.