On 2013 Jun 08, at 18:28, Chris Tracewell <ch...@thinkcl.com> wrote:

> I can't seem to make KVO work since it's an array in a dictionary inside an 
> array. 


In the area of tables and bindings, there are typically a half dozen design 
patterns which should work but don't, and one that works.  Binding to an array 
controller is generally the pattern that works.

I think you need to replace that dictionary with a class that has properties 
which you can bind to.  In the table column containing your popup cell, bind 
the Selected Object to the array controller with Controller Key = 
arrangedObjects, and Model Key Path = thatProperty.


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