No audio output in Cubase 8 Elements w/ Apogee Symphony I/O USB


I have recently bought an Apogee Symphony I/O MkI interface and the problem is even though everything is set up correctly (there is output from system sounds), I can get no output from Cubase. The device is recognized, all inputs and outputs are present in the VST Connections but there is no output, no meters are showing any signal when I hit playback. What I found out is that in the Apogee Maestro 2 SW the clock source is set to internal but in Cubase I cannot set it like that, it always goes back automatically to a dash below “internal” in the device setup.

Any suggestions on how to solve this? (using OSX version 10.13.3)