However it is not possible to drag the NSToolBar item in IB into an IBLibraryObjectTemplate view. I had naively hoped I could do this, and configure all the different toolbar items in this template and then import the configured toolbar into different nib files. It's clear that the toolbar object does some special stuff when dragged (i.e. attaching itself to a window when dragged into one) so I shouldn't be surprised you can't drag it into an IBLibraryObjectTemplate view, or for that matter the parent view that contains all these in the IB Plugin nib file.