I'm not saying it's not installed! It's very different since there may be dependencies on it, but the have left OpenSSL in favor of their own implementation, which is why the version remains.
The Apple version is not exploitable, but as you said "there may be dependencies on it" then openssl (an older version) is running and if it was the current version it would be EXPLOITABLE.
Even if Apple is running secure transport for some of their software and have deprecated openssl, as long as there are those dependencies at some point it is used and could have been exploitable. Thankfully Apple wasn't running the exploitable versions, but it is there, and it is used since there are dependencies.
My only points are that: Apple has openssl on OS X, it is a non-exploitable version, that regardless of whether some software is using secure transport or not other software depends on openssl (pre-heardbleed). Merely because Apple is transitioning to something else does not mean that openssl is gone.