You would have to change your list server settings for the mac to connect - unfortunately I do not think that it is easy to change the list server and if anyone knows how to do that on the mac they should post it. However, if you open the j2i files in a text editor you should be able to read the IP address and then type that into jj2.
Hope this helps! (I'll also try and see if there are any other known alternatives to doing this)