I remember an old fix for a significant amount of issues on Mac was using a hidden test version. Not sure if it's common knowledge but go into steam, properties and find the place where you can input a version code and type in
JustInCaseWeNeedIt
Unfortunately that fix alone didn't work for this issue but with the new .dll I'm willing to bet it does and will be trying it shortly.
Vektor wasn't a complete sightread tbh since I knew the intro but in the main verse there was one chord I missed every time, definitely requires practice. @ nlbsmglsk Put me in advanced I suppose.