The maximum possible color component value for the screen when it's in extended dynamic range (EDR) mode.
- macOS 10.15+
The value of this property is determined when you create the
NSScreen object, and doesn't change afterwards. If this property is greater than
1, the screen supports EDR values. If the screen doesn't support EDR values, the value is
The actual maximum value might be lower than this property's value, and can change dynamically, depending on the capabilities of the display hardware and other conditions. See