I'm writing this MacOS application which has a toolbar like this one:
Everything was working fine, but at some point it is only displaying the following:
I've tried everything here with no luck. Even deleted the whole Toolbar, but it still appears when I build the application, and can't get rid of it. I'm using Xcode 9, MacOS X High Sierra, and this is how my NSWindow tree looks like before deleting the Toolbar:
Any clues?
NSTabViewController
? – Willeke