IBOutlet for NSTextView in a ARC project

Question

As you read here in most cases a IBOutlet should be weak.

Now as you can read in the development library not all classes support weak references. (e.g. NST

Answer 1

I think I found the reason why some classes don't support a weak reference:

As you can read here:

Rationale: historically, it has been possible for a class to provide its own reference-count implementation by overriding retain, release, etc. However, weak references to an object require coordination with its class's reference-count implementation because, among other things, weak loads and stores must be atomic with respect to the final release. Therefore, existing custom reference-count implementations will generally not support weak references without additional effort. This is unavoidable without breaking binary compatibility.