Release Notes:
https://visit-dav.github.io/visit-website/releases/release-notes-3.1.3/
Prebuilt Binaries:
https://visit-dav.github.io/visit-website/releases-as-tables/
Catalina users should try to grant full disk permission to the terminal first:
https://github.com/visit-dav/live-customer-response/issues/111
If that still doesn’t work, then they can run visit from the command line:
/Applications/VisIt.app/Contents/Resources/bin/visit