You can download the official open-source version from VNC Address Book on SourceForge .
Choose a destination on your computer and save the file (typically as an .xml file).
Go to (or "RealVNC Viewer" on macOS) and select Export Connections .
If you already use RealVNC Viewer and want to "download" or move your existing contact list to another machine, you can use the built-in export function. To Download/Export Your Connections: Open . Click on Address Book in the left sidebar menu.