I bought the new update from Cubase 9 to 9.5. After a bit of evidence I can say that the famous graphics slowdown problems have disappeared, now I can finally work quietly, in fact everything works very fluid and fast without blocks.
In the next few days I will do more tests, but I can tell all Mac users that problems have been resolved.
I’m working with a 8-Core Mac Pro (Early 2008) that with Cubase 9 did not let me work because the graphic slowdown was too much, now everything works smoothly.
Great Steinberg are very happy, I was losing hope.