Horizontal Lines on Screen of iMac, 24", 2021

Same problem. Same screen lines. Same response from Apple Store. Not a manufacturing issue. You just need a screen replacement. That’ll be £630 please.

This definitely needs to be an extended Apple services program. Asap.

I have this problem for a long time now.

the lines no appear and disappear every 1 second, and also moves higher in the screens.

support acknowledges the issue, and that it presents in many iMac, but the repair has to be paid entirely by me…

Bought my M1 iMac last 2022. Used it regularly from 2022-Mid 2024. Have used it approximately 10-20x since Aug 2024 since i have moved out. While surfing the net, sudden horizontal lines appeared. Then began to shift. It distorted some of the display. Its been giving me headaches. Searched around and found multiple threads of the same issue. Also noticed that the left side of the monitor was also hot to touch. And it was only the left side that was hot, around the area where the first line began. I have yet to go to the authorized apple reseller as it only occurred a few hours ago. But have now sent feedback. Will update once i have some news. Hopefully this gets covered.

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I'm having the same problem. It started yesterday suddenly, showing horizontal lines and flickering. I restarted the computer, and then the black spot appeared in the upper left corner (it's extremely hot to the touch). I'm very disappointed because it's clearly a design/hardware issue that more and more M1 iMacs are experiencing. I'd like to believe it's not something planned, but Apple should at least respond with a product repair or, at the very least, a large discount on the repair. In fact, repairing the screen doesn't guarantee it won't happen again.

It seems this problem has been occurring more often since 2024 with M1 models, but if they use the same flawed design with other iMac models, it's only a matter of time before other iMacs start experiencing the same problem.

I haven an appointment today with the Apple service dealer in my country.

+ 1 I keep watching for it in the extended Apple Service Programs.

Apple Service Programs - Apple Support

Exactly the same issue happened starting yesterday, been talking to Apple support and kept asked me to bring it over to Genius Bar

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It needs to be replaced. At this time Apple has not announced a recall or offered to fix them for free.

If you want to bring this up to Apples attention send feedback:

Product Feedback - Apple

Exact same thing, the top left corner gets extremely hot as well. Take it to service center! make feedback on official apple channels!

Same issue here. iMac 24" M1 2021. Used for 2.5 years. The Apple Store staff suggested me to leave a message in Apple Feedback and let the people higher up look into the issue. The staff can't do anything if it is not in the Apple Service Program.

You are not speaking to Apple on these forums, they are the hosts however they DO NOT read or participate in user to user forums.

If you want your voice to be heard please post at www.apple.com/feedback. They will not answer you directly however your post will be read.

Same issue with my iMac M1, after two years of usage. Horizontal lines mostly from top to bottom, and flickering screen. Sometimes the upper rim corner gets too hot to touch. I sent feedback already. I'll take my Mac to service as soon as I can.

Hi,

Same here, got mine in October 2021 and the problem started a few months ago.

It's very annoying and gives you seizures/headaches because of the "strobe"effect.

Tried everything (reinstalling macOS, updating, leaving of off for days) and nothing worked.

Hope Apple recognize the problem and extend to its repair program.

I had this problem, now the screen doesn't work anymore, the screen has gone black at the bottom, you can't see anything... it's unusable now. This is called "planned obsolescence", it's not acceptable by the Apple brand.

This must surely be an extended Apple service program.

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You'll have to check the website I posted in my last reply to see if and when Apple will have a service/repair for the M1 iMac screen.

If you have to bite the bullet and get a new Mac I strongly recommend getting a Mac Mini M4 with a 3rd party 4k monitor. A Mac Mini M4 with 15 GB RAM and 1 TB SSD with a 32" LG 4k monitor w/speakers is $1418 w/tax which is $650 less than a similarly configured new 24" iMac.

Just some food for thought.

The horizontal black lines have started to show up persistently on my iMac today, after 4 years of occasional use. It started showing up about 1 year ago, but would go away after a restart or shutdown, or just disappear by itself. I typically use my LCD at 50% brightness or less.

I have called Apple to request for a repair and waiver of repair fee, they had not agreed to it yet, but asked me to bring it into a service centre.

I am respectfully requesting Apple to address this issue, as Apple devices are typically quite reliable.

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