Launching the WebCC Server Manually on macOS
You can start the WebCC server directly from a terminal. This is usually not practical for a production environment, but it can be very useful when troubleshooting problems. You can view the output of the server directly in the command line as it launches and handles requests.

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In a command line, enter the following command:
$ "/Applications/Toon Boom Harmony 24 [Edition]/Harmony [Edition].app/Contents/tba/macosx/bin/webcc.sh"