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iMac fan will not sleep after Security Update

Control fans on Apple hardware: iMacs, Macbooks, etc

Moderator: Steven

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jtksregna
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Joined: 20 Jul 2016, 18:00

iMac fan will not sleep after Security Update

Post by jtksregna »

Hello there,

I'm running Macs Fan Control 1.4.3 on a 27-inch Mid 2011 iMac with OS X Yosemite version 10.10.5.

Since installing Apple security update 2016-004 (https://support.apple.com/en-ca/HT206903), my iMac fan will not stop when I put the computer to sleep. I'm fairly sure it has something to do with this security update, as it was running fine before, but just wondering if this is a known issue? I have checked with Apple and they haven't heard about this.

Thanks,
Jon
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Steven
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Re: iMac fan will not sleep after Security Update

Post by Steven »

jtksregna
Hi,

How is it connected with Macs Fan Control?

PS. Try to reset SMC.
jtksregna
Posts: 2
Joined: 20 Jul 2016, 18:00

Re: iMac fan will not sleep after Security Update

Post by jtksregna »

I'm not sure it is connected to Macs Fan Control, but it doesn't seem to be connected to Apple either, so I was just wondering if anyone else has had this issue.

I have reset SMC, PRAM, etc. to no avail.

I take it that I'm the only one then experiencing this?
blinkmm
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Joined: 12 Aug 2016, 10:57

Re: iMac fan will not sleep after Security Update

Post by blinkmm »

I have a MacPro and after doing the security update my computer also will not go to sleep any longer. A soon as I turn off Macs Fan Control v 1.4.3 the computer sleeps without issue.

It is definitely tied to Macs Fan Control Version 1.4.3 as I can recreate this on other MacPros I own.
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Steven
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Re: iMac fan will not sleep after Security Update

Post by Steven »

blinkmm
What if you don't quit MFC but simply put all fans to auto mode?
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