I did a clean install of Catalina (OSX 10.15) and the Mathematica 12.0 installation was bug free. However, I can not install WolframScript, which I really need.

During the installation I get the following error after entering my password:

**This package is not compatible with this version of macOS.**

*The package tries to install content on the system volume. Contact the software manufacturer for assistance.*

And I just have a "Quit" button to click.

I can not mention this problem on Google or here. Actually, Google shows: *No results found for "This package is not compatible with this version of macOS" found mathematica.*

Thanks in advance for any help or an indication of where / what to look for!