[X-Istence]

That is the case anyway on OS X, since each .app bundle contains all of the libraries for that app, the only ones that you don't include are the ones that Apple ships with the platform itself.

So even if an issue was found in a shared framework, it has to be fixed for every app that includes it.

[binarycrusader]

I'm well aware of that. Which is why I specifically said they all share the same copy.

As for the shared framework; that's not true necessarily. Not all system frameworks are included in the app bundle.