1. iMore Question's Avatar
    Hello There, I recently got a refurbished 5k iMac 27 inch 3.8ghz from apple's website I used it almost a week and I have noticed that some hissing noise near the power button when I turn off my Mac or only once when turn on my Mac and I also have boot camp installed and it does not happen their but today I wanted to test this hibernate feature in windows so I did it and it shut off with that noise and when I turn it on it turn on with that noise so is this normal? Do I have an defective iMac? If so I don't have an apple store near
    10-08-2018 07:47 PM
  2. Spencerdl's Avatar
    Welcome to iMore. Feel free to join and become a member. I personally don't have an iMac (wish I did), I would think any "hissing" noise would not be normal, but maybe someone will chime in with more help.
    10-09-2018 08:50 AM

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