Show NSPopover from NSToolbarItem Button

Question

I want to show an NSPopover from an NSToolbarItem button in my toolbar.
(i.e. positioned below the button).

Ideally, I want to pass the

Answer 1

You can send the action directly from the NSButton enclosed in the NSToolbarItem (which is what you should generally do anyways, consider segmented controls, where each segment has its own target/action), and that will do the trick.