Our view-based NSOutlineView still has a few annomalies, but mostly works.
Now, we are attempting to install a hoverView in our outline column to
launch a popover (display only) when mousing over a row.  This works just
fine with NSTableViews, but so far does not work at all with NSOutlineView.
We had hoped this would not be a problem because NSOutlineView is a subclass
of NSTableView.  Our theory is that because the presence of turn-down
buttons in the outline view, there must be an additional intervening view
that handle this and related layout issues within the cell.  Has anyone
successfully used a hoverView with NSOutlineView?

BTW, a word to the wise.  Bindings to arrayControllers through a
viewController¹s representedObject is still problematic.  We have filed bug
reports on this in the past (confirmed bug).
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