Since the upgrade to 10.3 the GUI is really, really sluggish. When a project contains an average amount of tracks/plugins I can hardly work in it anymore because of the stuttering of the transport/meters. Audio + video play fine, but the GUI freezes for seconds after pressing play. It gets worse when zoomed in more.
It also affects N10.0, because opening the project in 10.0 gives the same problem now, and there never was.
I tried trashing the preferences, but it doesn’t help.
Anybody else experiencing this on a Mac Pro 5.1-High Sierra?