[bsaul]

Unfortunately it's not a written statement ( you can imagine that nobody working at apple would publicly say a thing like that). And it's not a direct source either, so you can very well take that with a grain of salt.

Actually, I am still hoping that someone will contradict me by providing concrete example of apple software using core data though, because as i stated, i invested a lot in that technology for an important project.

[scrumper]

Well, the Notes app on Mavericks uses Core Data. I know it's a trivial example but it's the first one I found.

(~/Library/Containers/com.apple.Notes/Data/Notes/NotesV2.storedata is a Core Data SQLite store.)