Indicates whether the screen saver application should perform a gradual screen fade when it starts and stops the animation.
- macOS 10.0+
This class method allows the screen saver view to select how the desktop visibly transitions to the screen saver view. If this method returns
true, the screen will gradually darken before the animation begins. If it returns
false, the transition will be immediate. The latter behavior is more appropriate if the screen saver animates a screen shot of the desktop, as is the case for optical lens effects. The default is