0.4.2 is ported and largely functional, yes. I am not a tracker, so I don't know all what 'quirks/features' of the tool are or are not working. I am somewhat reliant upon users -- that have yet to materialize . With, of course, the exception of people like jrlepage who pointed out a malfunction in the DELete key handling.
I now have a MacBook Air, so I can do native OSX builds of FamiTracker...but I'm learning about how to put DMG's together -- my first attempt with FamiPlayer ended in failure because I haven't packaged the Qt framework properly. Also, OSX has some strange quirks that Qt doesn't seem to handle very well -- native menus, etc.
Thanks for the source link. I'll take a look at the diffs from 0.4.2 and see what I'm in for.