You can try Alice but I fear you are on a loser. I have just been to www.hearme.com and the only programs I can find linked to on their main page are their business products. On the previous occasion I visited thier site, I noticed that the system we are using had "disappeared" but they were offering a more ICQ like system for personal use.It has been my feeling for some time that Hearme have no intention of offering Mac support for our system. I suspect that they have now got enough of a name not to need to keep distributing thier free personal products.
Hearme do offer a system called POP.x which has Java support which means it should run on most platforms but prices start at $37,500.
Jon