The Apples Human Interface Guidelines say:
macOS Human Interface Guidelines: Panels
How do I make the very first titlebar in that image (with only a close button). Disabling both Resize and Minimize in IB only make the resize/minimize buttons get disabled. But I want them to disappear. How can I do that?
I believe this should work:
[[window standardWindowButton:NSWindowCloseButton] setHidden:YES];
[[window standardWindowButton:NSWindowMiniaturizeButton] setHidden:YES];
[[window standardWindowButton:NSWindowZoomButton] setHidden:YES];