Our unix mail app ports cleanly over to OS X, but we are prevented from
doing proper attachment handling, because unlike most unix flavors, there
are no default mailcap or mime.types files, the *nix way of attributing
file associations for determing which program to open a file of a specific
For OS X, I've stumbled upon the LaunchServices API, the blessed way to
open files. This does most of what I want, and I was pleased to see in
10.3 a way to translate from mime-type to file extension and vice versa
through mechanisms set forth in header file ...