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iMac high pitch sound

I've got the new 5k iMac late 2015 and with graphic card m395.

This is my 4th replacement and all the computers are making high pitch sound.

This is how it works, as long as I turn on my power supply, it makes the sound. I don't have to boot up the computer, even if the computer is shut down, it makes the sound. I can tell if my power is on by sitting 2m away from the computer.


The sound comes in on and off. According to some people, it's the brightness of the computer. I tried at all brightness, all of it makes sound.


Apple senior advisor said that engineers are looking into it but I don't believe him, it has been 2 months.

Macintosh apple

Posted on Feb 14, 2016 6:28 AM

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iMac high pitch sound

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