UML modeling tool which can convert a collaboration diagram into a sequence diagram (and back)

I was reading about UML Collaboration diagrams and what all of the tutorials mention is that a sophisticated UML modeling tool can easily convert a Collaboration diagram into a sequence diagram. I have looked around at a few and haven't found one that can do this which also runs on a Mac.

If you are aware of such a piece of software, which is still being actively developed, I would be interest开发者_Go百科ed.

You can convert a sequence diagram to a collaboration diagram but not a collaboration diagram to a sequence diagram. It is also possible to display a method either in a sequence or a collaboration diagram. It seems to me that the collaboration diagram has been replaced in UML 2 by the communication diagram. I have EclipseUML Omondo as my company modeling tool.

Have you looked at MagicDraw? I don't know if it covers your request, but it's one of the more full-featured ones out there.