Aaron Tuller had the answer to the question. I needed to make sure the property
is dynamic so that KVO picks up the change. I have made the commit and it works
for anyone who is interested.
https://github.com/ericgorr/sb_ac_doc/commit/a2ca8957f1216cf656c3cc0d9246f84d1dcb0e67
> On Mar 14, 2016
I have a core data, document based, storyboard OS X application.
There is a test project here:
https://github.com/ericgorr/sb_ac_doc
which is just the default project Xcode creates with a few modifications.
I have a single view controller and the view contains a table view which will
eventuall