I just wanted to chime in here and mention that I tested @curtisw’s performance improvements and they appear to give a major boost to Grasshopper on Mac. Curtis has done an amazing job with this and we hope you test out the the Release Candidate and report back.
Previously, the FPS counter found in View > Canvas redraw speed was broken, but Curtis has fixed that too in this update. That means that, going forward, we can make more meaningful comparisons to see if we’ve improved or regressed.