On Macports we (well, not me as I'm just a bug reporter) succeed in having the latest KMyMoney version working natively on MacOS X.

We still have some problems, with some charts for example, or with visual aspect. But it's really nice to see that it works pretty well. Well done to the developers of this wonderful app !

Please, follow this link to see one bug report on Macports bugtracker. It has some screenshots in it where you can see the visual aspect of KMyMoney on MacOS X. Maybe it will help you to improve it.
There is also an explanation on the Chart bugs we encounter.

Thanks !