By basejka I mean no mods, you didn't really say, but lots of people run JA+ or something that could be causing a problem.
Well, you say it's on a mac, and I dunno much about the port. Does the port come with its own Mac dedicated server? otherwise, the dedicated server download i've seen from raven has a windows .exe and a linux .so file.
And I should have asked earlier, but are you trying to play on this server from your own computer? or are you hosting it for other people to connect and play on. Because once you start a dedicated server, it's generally going to be a console window with text output that gives you information. Thats where the term dedicated comes from, the host isn't playing.