I would try this with windows 10, but I lost my just recently downloaded AC21 installer exe-file somewhere. I am not very good with windows yet, I am a beginner with this WIN-world.
My idea was to rule out a win-MacOS difference with AC21, something graphisoft surely would be able to straighten out quickly enough.
I'll have to try again to install. Or maybe somebody else can do this test quicker than me.
AC25, Rhino6/7+Grasshopper, TwinMotion • Mac Pro 6,1 E5-1650v2-3,5GHz/128GB/eGPU:6800XT/11.6.5 • HP Z4/Xeon W-2195/256GB/RX6800XT/W10ProWS