Ron,
thanks for the reply.
I ended up adding a .plist into the /Library/LaunchDaemons directory with this content:
Where the startup_script.sh is temporarily placed at the root level. The script does nothin more than calling the code you pasted above (calling the firefly app with the config file).
This has the effect of starting up 2 firefly processes when the system boots. My local iTunes can see the server just fine, but the soundbridge reports “Incompatible Music Server found”, and I _can’t_ browse to the server over the web interface (hardcoded port 9999): http://localhost:9999 returns 404
So, a partial success, and maybe you know how to fix these things?
thanks a lot!