It’s still in a pre-beta state, but to my surprise and great delight, someone has announced an in-progress HTML TADS interpreter for the Mac, so that those of us on this platform can enjoy the pretty pictures and elegant formating that are supposed to accompany certain recent TADS games.
The author of this application has invited testing and is also looking for a graphic designer to supply icons for the application itself and its associated game and save files. If you’re inclined to help out, the announcement is here and the download itself here. (If you decide to test, you should read the announcement carefully, since there are some issues the author is interested to hear about and others that are known and not worth emailing in.)
Emily Short's Interactive Storytelling 