strobe light effect of lines on screen

Experiencing sudden and repeated rapid stone light effect of plaid like lines on the screen. Anyone have the cause and solution?

Posted on Nov 29, 2023 12:43 PM

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Dec 1, 2023 8:05 AM in response to MM752

This seems like a hardware issue to me.


First, to rule out software issues, boot your Mac in the safe mode

Start up your Intel-based Mac in safe mode

  1. Turn on or restart your Mac, then immediately press and hold the Shift key until you see the login window.
  2. Log in to your Mac.
  3. You might be asked to log in again.
  4. On either the first or second login window, you should see “Safe Boot” in the menu bar.


If the issue is not persisting in safe mode, it is caused by an external piece of software, you might want to evaluate the software installed to your Mac.


If it is persisting, it is most likely a hardware issue. Please Contact - Official Apple Support to set up hardware service for your iMac Pro

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Dec 1, 2023 12:57 PM in response to WheelieNick

I confirmed it is Intel and followed the instructions. It appears to be a hardware issue. I suspected that might be the case but having never experienced this issue thought it was better to reach out for help. I appreciate your responding and providing me with guidance.

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strobe light effect of lines on screen

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