Change MacBook Air screen to black and white
Is it possible to change my macbook air settings to display a black and white screen?
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On your MacBook Air, go to Apple menu >> System Settings >> Accessibility >> Display.
Under Color Filters, turn on Color Filters and choose Grayscale.
This will display your entire screen in black, white, and shades of gray.
Apple’s instructions are available here: Apple Support: Change display colors on Mac
You can also press Option–Command–F5 to quickly turn the color filter on or off. Apple Support: Accessibility shortcuts on Mac