--- a/ui/cocoa/MainWindow.h Sat Jun 06 16:53:39 2026 +0200 +++ b/ui/cocoa/MainWindow.h Sat Jun 06 18:04:54 2026 +0200 @@ -29,7 +29,7 @@ #import "toolkit.h" #import "../ui/window.h" -@interface MainWindow : NSWindow<UiToplevelObject> +@interface MainWindow : NSWindow<UiToplevelObject, NSWindowDelegate> @property UiObject *obj; @property (strong) NSSplitView *splitview;