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If I press keys that don't do anything on the focused app then the whole screen flashes white, as if the option to flash the screen on alerts (in accessibility preferences) was on, but it is not.

For example typing this question the screen does not flash, because pressing the keys is doing something, but If I'm on an app where there is no text field that can be focused pressing keys will make the screen flash white.

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3 Answers 3

Reset to default
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I think there's an option in System Preferences. Go toSystem Preferences > Accessibility > Audio and uncheck the box that says Flash the screen when an alert occurs.

Hope this helped!

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2

I had this problem in High Sierra (10.13.6) and a system restart solved it.

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I had same problem Sonoma 14.5 (23F79) and you can't fix from settings. After each restart, problem will be solved until first sleep.

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  • Same where. I thought someone was hacking me and taking screenshots. Glad to see it’s just a bug.
    – Eric Weintraub
    Commented Aug 9 at 17:43

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