Retina 5k graphics issue

hello could someone from steinberg tell me if there is a fix for the graphics for cubase 8.5 on iMac retina 5k displays ?
also is the problem occurred from el capitan ? if we update on siera is this fixed?

Steinberg currently does not support Retina and our development team in Germany is currently testing our current line-up of products on Mac OS 10.12 Sierra. Therefore we strongly recommend waiting with the update to Mac OS Sierra until the entire compatibility chart for all Steinberg products has been published on, especially if you rely on a trouble-free operation of our products.