Bye Catalina, Hello Big Sur

[KPeter]

Hello @andrew, no worries Yes there is a reason, please take a look at this thread:

OS version query

Yes, the reason is purely technical. Shapr3D for mac is running on Catalyst, which is in a poor shape on Catalina, and not available on Mojave unfortunately. If we see significant demand for supporting older macOS versions, we will do it, but that would mean that we have to rewrite the UI from scratch, which does not sound like a reasonable investment, especially considering that most likely the M1 macs will gain very significant market share over the next couple of years. Another issue is that …