@jbni
i guess it has to do something with the Master File Server (or how is it called?). So there has to be a WinPC in the network and you can see the mac with AmigaNetCenter (when is coming an update btw?!
and the amiga with your mac.
I managed to share files between the mac and AmigaOne, but now i'm having your same problem with my Sam, it is visible in the network as long as a WinPC is connected but I can't share files... and I can't remember exactly the settings to solve the problem.
I will have a look into it this WE, time permitting..