The text view is remaining editable even after I deselect the Editable property. If I remove the binding to File Owner’s log property, then it becomes non-editable. Everything is working other than that. I’m on Xcode 7.2.1, Swift 2.1.1, OS/X 10.11.3.
Yes: Try deselect Text Views binding inspector: Attributed String “Conditionally Sets Editable”. (Still modal key path to "log’.)
That fixes it. Thanks.