UDP broadcast on a Mac?

[Malte Brill]

Not really moving forward. Seems this is not allowed under OSX. I tried this from Terminal:

echo “hello” > /dev/udp/255.255.255.255/9997

Yields permission denied (even with SUDO) however:

echo “hello” > /dev/udp/127.0.0.1/9997

works as expected (as well as any other known IP address) 

Stuck...