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The March 2015 update of Apple's 13" MacBook Air features fifth generation Intel Core i5 and i7 processors, resulting in slightly increased performance and battery life.

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Fans turning on when in Sleep mode or the lid is closed

Hi everyone,

So the issue with my Mac which I couldn't figure out what causes it: when i put it in sleep mode or just close the lid the Mac still runs just with blackened screen. Also the fans randomly turns on and start spinning on max RPM.

I don't understand why the Mac doesn't hibernate like a Windows notebook and why the fans starts spinning up when it's not even hot or something.

Does anyone know what could be the issue? Tried the PRAM and SMC reset several times but doesn't seem to solve this.

Answer this question I have this problem too

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How about installing TG Pro and run the diags within it. Let us know what it tells you.

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I downloaded the app but I can't find diags in it, I never used this


@totyamuri - Sadly you need the full version to get it. Apple killed the onboard diagnostics so this is the only way to get some details on what’s happening.


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Attila Tóth will be eternally grateful.
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