macOS version 11.0 Beta (20A5343i) 3dm file loading problem

3dm files not loading after macOS version 11.0 Beta (20A5343i) installation.

all 3dm, or just one particular?

All 3dm files and also .dwg not loading.

Best wishes,


Same issue here on 11.0 Beta (20A5343j). Issue is also present in RhinoWIP.

please run the systeminfo command in rhino and please post your results here.

Hi - I’ve put this on the list as RH-59841.
We are running tests with Rhino on Big Sur and we expect there to be several issues.
If you depend on being able to run Rhino reliably, I can only recommend sticking to Catalina for the time being.


Seems to work now. Problem for me looks like a Norton conflict with the OS.