Ensure that syslogd has udp sockets enabled: OS X
make
0> syslog:start_link(name, tag, "localhost", 514, local0).
ok
2> syslog:send(name, "test").
ok
3> syslog:notice(name, "other test").
ok
$ syslog
...
Tue Mar 16 18:36:48 192.168.1.101 tag[4294967295] <Info>: test
Tue Mar 16 18:36:57 192.168.1.101 tag[4294967295] <Notice>: other test