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i Mac fans hissing at start up

i Mac fans hissing at start up - - how to fix


Posted on Jun 1, 2023 7:30 AM

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Question marked as Top-ranking reply

Posted on Jun 1, 2023 11:03 AM

What year model is this iMac?

see > Identify your iMac model - Apple Support


Have you tried resetting the iMac's SMC?

see > Reset the SMC of your Mac - Apple Support


Has any hardware ever been serviced, replaced or upgraded?

(a broken or disconnected temp. sensor can cause the fan(s) to run out of control)

5 replies

i Mac fans hissing at start up

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