preference pane
A common requirement in any Cocoa application is a preference pane style window where each toolbar item switches to a different view in the main window, resizing as necessary. I’ve used BWToolkitto do this in the past, which provides BWSelectableToolbar. However, there are a few issues with using BWToolkit: If you want to deploy on the Mac App Store, You have to customise it to remove all uses of private methods, since those are banned on the App Store.