Sure thing! Can you share some frame rate comparison with TestMaxSpeed with TestMetal turned on and off?
The new version of Rhino mac Version 7 (7.8.21196.05002, 2021-07-15) is now finally way smoother in drawing in 2d and feels much faster.
It also opens AutoCAD dwg files and you actually are able to work on them (because of the display speed)
This is such a relief! Thanks McNeel for you to have kept making this product better!
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Despite many of the complaints and feedbacks we provide on this forum, I got the chance to work on an AutoCAD project after many years and this makes me appreciate the hard-working developers from Mcneel solving issues in Realtime 
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The only thing which I wish so dearly is that Rhino mac in future will be able to handle large drawings with curves and blocks faster