Rhino for Mac Maxwell Plug-in missing


I’m using Rhino for Mac 5 together with Maxwell for Rhino 4 plug-in. Have been working with both for 2 years.
Recently I updated my OS to macOS Catalina. And suddenly the Maxwell Plug-in is missing.
It’s still located in the Rhino App folder - /Users/ YOURUSERNAME /Library/Application Support/McNeel/Rhinoceros/MacPlugIns.
But not in Rhino under Render - Current Renderer.

I re-installed both. But no success.

I would really appreciate any solutions or recommendations!

I’d first check if there is an updated Catalina-compatible build available from NL, otherwise Dan posted some instructions here which may help you get it running.