[eropple]

That's more or less what they do with iTunes, isn't it? I recall there being an incomplete library packaged with iTunes once upon a time (with stuff like a stub implementation of Grand Central Dispatch that was neither grand nor dispatching).

[pcwalton]

iTunes (used to, at least) have a lot of Mac OS 9/Carbon stuff partially ported to Windows, in fact.

[m_mueller]

> stub implementation of Grand Central Dispatch that was neither grand nor dispatching

Thanks for the chuckle, almost r/programminghumor worthy ;-)