Aloha m,
First, congrats on the new ax.
1-Is yer new Mac box a ‘Retina’ version?
2-If so could this be causing the probs?
If you do a board search you will find that there have been a few posts
about Cubase and Mac Retina Display 'puters not playing well together.
Reason I ask is because C6 (and even C5) seem to work fine here under Mav.
Hope you get it sorted.
{‘-’}