HT204463: iMac: Fans run at full speed after computer turns on

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spacebear

Q: My 2010 iMac is used as a second monitor to my new 5k iMac. The fan runs at high speed nonstop. How do I make it stop?

I have reset the SMC (I think that was it) to no avail. The old iMac gets incredibly hot although I have nothing running on it, just used as a monitor for my new iMac. They are both 27", connected via mini display. I have nothing running on the 2010 other than standard OS.

iMac, OS X Mavericks (10.9)

Posted on Jan 27, 2016 9:08 AM

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Q: My 2010 iMac is used as a second monitor to my new 5k iMac. The fan runs at high speed nonstop. How do I make it stop?

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