On Tue, Sep 16, 2014, at 05:04 PM, Jerry Krinock wrote:
> 
> > On 2014 Sep 16, at 10:29, Jens Alfke <j...@mooseyard.com> wrote:
> > 
> > Maybe it's the animation that ends up dereferencing all the rows? I forget 
> > whether there's a way to disable the animations on an NSOutlineView …
> 
> I can’t find any such control, Jens.

I'd try wrapping things in an NSAnimationContext with
allowsImplicitAnimation=NO. Though I'm not sure where you would have the
opportunity to wrap the built-in expand behavior.

--Kyle Sluder

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