[R]No prompt for user/pwd when adding WSDL in 4.6.4 Mac OS X

I'm trying to add a WSDL but not having success. My environment is SoapUI 4.6.4 Build Date: 20140110-2328 on Mac OS X 10.7.5. I paste this url in the "Add WSDL" dialog and click OK: https://mydomain...