Sorry, but I remember there have been issues with the mac.

I think, the UI code that I used to make the dialogs, is just not there on the mac. I have no idea why this is, but the python libraries on windows and mac are different, and I didnt know this when building the tool. I used the TK framework. Technically spoken, it could be ported to the mac by using WxWidgets, but this is difficult, takes long time for retest, and few people would need it, especially as there is now goz.