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Cannot Disable Flash Screen on Notification Alert on Mac

In this guide, we will show you the steps to disable the flash screen on notification alerts on your Mac. macOS beholds quite a few Accessibily features segregated under the domains of Vision, Hear, Motor, Speech, and a few General tweaks. These functionalities come in handy for numerous users and aid them to get the job done quite easily which otherwise would have called for an additional or even outside effort.

One such feature is the flashing of the screen when a notification alert appears on your Mac. By default, this feature is disabled because the sudden flash could have an adverse impact on the users. With that said, there are a few users who had enabled this functionality and are now trying to turn it off but are unable to do so. If you are also in the same boat, then this guide will make you aware of a nifty workaround to address this issue. Follow along.

Cannot Disable Flash Screen on Notification Alert on Mac

Cannot Disable Flash Screen on Notification Alert on Mac

  1. Go to Launchpad > Others > open Terminal.
  2. Then type in the below command and hit Enter:
    defaults read com.apple.universalaccess flashScreen
  3. It will give you the current value [0 is disabled 1 is enabled].
  4. So type in the below command to disable flash screen:
    defaults write com.apple.universalaccess flashScreen 0

That’s it. These were the steps to disable the flash screen on notification alerts on your Mac. If you have any queries concerning the aforementioned steps, do let us know in the comments. We will get back to you with a solution at the earliest.


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