Add and remove buttons for NSTableView (Mac Interface Builder) [duplicate]

Question

Check the following image, how can I add this kind of bar to my own NSTableViews? Other uses are in the network preferences app. What's the magic trick to make this work?

Answer 1

I don't think there is any "magic trick." This is something you will have to implement yourself.

It looks like a group of Gradient style NSButtons placed below the table view. An NSSegmentedControl in Small Square style would work too.