I was able to run SketchUp 2021 under Mojave (MacOS 10.14). I just upgraded to Catalina (10.15.7) and I get the following when I try to run SketchUp:
The following errors were found when launching SketchUp: - Hardware acceleration is unsupported or has been disabled on your “Apple Software Renderer” graphics card. SketchUp requires that you use a hardware accelerated graphics card. Unfortunately, these errors will prevent SketchUp from running. Updating your graphics card drivers might fix the problem. See this Help Center article for more information.
I have a NVIDIA GeForce GT 120 video card, and it appears to be functioning, as normal graphics-intensive things (like “genie effect”) is very zippy. System Preferences —> Software Update offers no help, and says I am up to date.
The link above says SketchUp requires OpenGL 3.0. System Information —> Frameworks says I am running “OpenGL Version: 17.10.22,” which doesn’t sound useful.
Any ideas as to what to try to get SketchUp to work?