TWebbrowser in Delphi 10.3.2 MacOSX 64-bit

I have a multi-platform app that runs on Window/Android/32-bit Mac. I added the 64-bit MacOSX platform today to test it out.

The application compiles and runs (no code changes), however the TWebBrowser component is broken with 64-bit.

When compiled and run as 32-bit, it displays web pages fine. With 64-bit, even the simplest http://... web pages are not displayed (no error reported).

It will display local html files, using the syntax, for example:  WebBrowser.URL:='file://'+ResourceFolder+COMMANDSURL;

Any ideas? A bug maybe? Perhaps the mac firewall is preventing external addresses?

--- Dave