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Horizontal grey bar on my M1 iMac screen

For the past 2-3 days I have been seeing a greyish bar on my M1 iMac's screen. After a few hours the grey bar starts to blink on & off, sometimes disappearing entirely but reappearing again after a 'wakeup from sleep'.



What exactly is happening here? And what can be done to fix this issue?


And yes, I did the obligatory restart/shutdown etc. but this grey bar still appears.


iMac 24″

Posted on Aug 20, 2023 11:35 AM

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Posted on Aug 15, 2024 1:50 PM

same here. Less than 2 years old. Extremely disappointed at Apple. Hopefully they proceed with a big global replacement program like they did with the AirPods Max.

27 replies

Aug 20, 2023 9:05 PM in response to ku4hx

That's fine. The thing is a good many people have gotten into the habit now of simply copy pasting numerous stock answers that has nothing to do with the problem or even the device at hand, a very frustrating part of this community thread now.

The new iMacs's have integrated graphics built into the M1 itself so the repair will prob be basically the replacing of the entire board. One of the 'joys' of Apple's obsession with slimming and integrating everything! However I am personally leaning towards this being an issue with the screen itself.


Yeah, looks like I need to have Apple examine this. Still, Thanks for your attempt mate.

Horizontal grey bar on my M1 iMac screen

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