What I have to say is not encouraging:

There's nothing for the Mac.

I've made do with two things:

(1) TypeTool: This is a font-making program that costs $99, but it's much
less than $500 (which is what the next cheapest font-making software bundle

(2) FileMaker Pro: A friend of mine gave me his copy of FileMaker Pro (which
is NOT cheap), and, along with it, some data sheets he made, one of which is a
sound-change simulator.   You can add your own sound changes and it will
generate a list of random words for you--fully customizeable.

Other than that, I don't know what to tell you.   I don't know what
programming is, much less how to make what people call a "program", so I can't do
anything about the lack of Mac software.   There is tell, though, of a Mesiah that,
one day, shall come forth, and free the Mac using conlangers of this earth,
that we bask in the glory of the language-making technology currently horded by
the evil Romans--I mean, P.C. users.