For those of you who found this page searching for a Mac OS X version of Cold Fusion and ended up here, I’m sad to report that such a beast does not currently exist. There is a petition here. As far as I can find, there isn’t anything on Macromedia’s site that addresses this question directly. One would think that it is only a matter of time before the most widely distributed version of Unix gets support, then again this is a server product not a desktop one.