A Boolean value that indicates whether the window prevents application termination when modal.
- macOS 10.6+
The value of this property is
true if the window prevents application termination when modal; otherwise,
false. The default value is
Usually, application termination is prevented when a modal window or sheet is open, without consulting the application delegate. Some windows may wish not to prevent termination, however. Setting this property to
false overrides the default behavior and allows termination to proceed even if the window is open, either through the sudden termination path if enabled, or after consulting the application delegate.