H. G. Muller wrote on Tue, Sep 29, 2009 08:16 AM EDT:
Well, XBoard 4.4.0 should be able to run on a Mac. Hans Aberg was even able
to compile it for a Power-PC Mac. And if you can't install from source:
there was a request on the WinBoard forum for a binary Mac version, and
perhaps some Mac user that is set up for compiling will make one available
for hosting there.