Modding on Macs is quite limited. You can't convert to a DDT on a Mac, but you can convert from a DDT on a Mac. I use Parallels so I can use all the features of AoMEd, but it would be nice to be able to do it on a Mac. Ykkrosh mentioned that he'd be getting a Mac soon, so maybe I can convince him to port AoMEd to Mac for me.
The only tool ever made for Mac modding is AoM Tool, which was unfortunately abandoned. I've emailed the guy a million times, no luck.