Does the job

Its a little clunky, in that you cant drag and drop, not that I have noticed anyways, but it does the job and at $1.99 is very reasonable. There is an online winmail coverter, but it freezes my Mac 9 out of 10 times so this app is a way better alternative!

Joker2111 about Winmail Viewer - Open dat file, v2.0.0