mDNS discovery is not available.

[derwaldgeist]

I tried the interactive.js sample out on MacOS El Capitan, but only get the error message:

mDNS discovery is not available.

If I try to set-up a session myself, I only get

Socket is already bound

for any combination of names and ports.

Is this still compatible to El Capitan?

[pkoevesdi]

The mdns package is missing. You can install it with
npm install mdns
On Ubuntu 17.10, I had to install libavahi-compat-libdnssd-dev first.
After that, instead of mDNS discovery is not available. I get several warnings about the Apple Bonjour compatibility layer of Avahi.
On creating a new session, again I get Socket is already bound
Any solution?