but am willing to do anything to upgrade to a newer better version.
Really? I guess we've found someone who buys Phoenix a Mac after all, so that he can do daily compiles. ;-)
Seriously: Are you afraid of compiling things yourself? I can guide you through a lot of things, but I've never owned a Mac myself, so I don't know everything.
The first step is installing xcode in the most recent version. If you've done that get familiar with macports and install autotools, flex, gettext and libpng.
Well, see
the wiki article and try to follow the steps for the rest, if there are any problems, please do not hesitate to ask.
kind regards