iMac 27 "mid-2011 - Intermittent problem with CPU fan running at full speed and sleep mode.

Hello!

My iMac 27 "has an intermittent problem with the CPU fan runs at full speed. Sometimes it happens at the time when I start it, sometimes only in my session, and sometimes only after a certain time. So does seem to be a problem of "heating".

Second issue is with the mode 'sleep'. It may occur also at any time, at the start of the iMac, session, or after a certain time. But once he starts to go in mode 'sleep', when I wake up, it goes right back in mode after a few seconds and that it will continue indefinitely until I restart the computer.

What could be?

Please help me!

4ntoine

Here is my model of iMac:

iMac 27 "mid-2011 model 12.2

Intel Core i7 3.4 GHz

AMD Radeon HD 6970M 1024 MB

OS X El Capitan 10.11.6
SMC 1.72f2

Boot ROM IM121.0047.B23

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Tags: Mac

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