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iMac Retina 5K 27" Late 2015

All of a sudden the fan for my iMac is really loud and it constantly runs. Never slows down or gets quiet. Sounds like a white noise generator. Has even one ever had this issue with this specific model of iMac? It does not have the T2 controller so the reset probably won't work. Any suggestions?

Posted on Dec 9, 2020 4:18 PM

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Posted on Dec 9, 2020 5:13 PM

Reset the SMC as per the Desktop instructions, at > How to reset the SMC of your Mac - Apple Support


Desktop computers

  1. Shut down your Mac, then unplug the power cord.
  2. Wait 15 seconds, then plug the power cord back in.
  3. Wait 5 seconds, then press the power button to turn on your Mac.

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iMac Retina 5K 27" Late 2015

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