imac 2021 buzzing noise

I also have the same question with the power cable.

I already took my iMac to 2 different Apple Stores, and they couldn't reproduce the issue there, so they didn't do anything about it. But then I realized they had used their own power adapters, and not the one that came with the Mac. It might have nothing to do with it, but I just wanted to test it myself... Only problem is, where the heck am I supposed to get a new one, when Apple themselves don't sell it (yet)? 😓

Very interesting if it's caused by the power adapter. But I doubt it. Probably they were just in a too noisy environment

And please try opening this page https://context.reverso.net/traduzione/inglese-italiano/example on context.reverso, doesn't the iMac literally sing? So weird

I just took my iMac to an Apple Store, and they could in fact replicate the sound when the display brightness was low, but stated it was "normal"... for this model at least. They hit me up with "Your product is ready for pickup", having done absolutely nothing to fix the issue.

Then I spent a couple of hours talking with apple support and the conclusion was: this is a known issue but we can't fix it... sorry.

The power adapter hypotheses seems interesting, but why should I be the one trying to find the solution to their defective product, that's the apple's technician's job!

"A part of me is worried that this will be viewed as expected behavior and won't be resolved with this generation of the iMac."

This is exactly was is happening now, I recently took my iMac M1 to an Apple store and they told me the sound is "normal" and they can't do anything to fix it.

They're all like this, there is no fix and there is no point in having it exchanged. To Apple this level of noise is considered normal. I would only consider it a problem if the noise is REALLY strong, I mean 30/40dB strong and audible with room noise at 1 meter distance. But if you just hear a faint buzz at night or in a quiet room then don't bother, they're all the same in this.

It happens the same to me. Apple replaced my brand-new M1 iMac for another one, in this second one the noise is lower, but it's still there. I don't think this sound should be considered "normal" and I hope Apple creates a Service program for this issue.

My 2021 iMac 24 makes the noise, depending on brightness level, and it makes concentrated work frustrating.

The only option is to plug my ears or listen to music.

I have asked Apple for help several times, but since it was after their so called 3 week "grace period" they refused to replace the unit, and repair is not an option, since the problem is not detected by the Apple test procedure.

So Apple considers this issue a non issue, it does not exist, and when I ask for help they act like they have never heard about it.

So I'm very surprised that several people on this board reports that they have had their unit replaced - is Apple support treating people differently depending on region?

Is a known issue in one region not a known issue in other regions?

Bottom line is: I'm stuck with an iMac that Apple refuse to fix, and that is difficult to use for concentrated work - is my only option really to sell my iMac?

Tried increasing the brightness and yes, the noise goes away, the moment the brightness is reduced again, it starts right back.

you're welcome. i'm happy my advice had you reach out to apple and find a solution. :)

I have the same problem. Buzzing sound coming from the back side. You can hear it only if there’s complete silence. Wondering if it’s a malfunction or something acceptable on every new iMac 24…

can you also locate it behind the ports?

Yes. Also behind the on/off button. The noise stops when I set the display on maximum brightness.

yes Colin-g-davidson, i know you already contacted apple. :) this new response was for the new posters. :) thanks for trying to help me affirm this for them.

I’m not sure but I have noticed the noise (it’s like a subtle whistle” after updating to Big Sur 11.4: is it possible it may be caused by this update???

i doubt it was caused by an update. but, once again, noise from a new iMac is not normal. it is an issue you should be contacting apple about ASAP. best of luck. :)