Noisy fan after waking up from sleep?

Discussion in 'iMac' started by hi99s, Jul 14, 2011.

  1. hi99s macrumors newbie

    Jun 9, 2011
    Is the fan in the iMac supposed to spin madly after waking up from sleep?

    An iMac I returned a few weeks ago (with other problems not realted to this but was a factor in me returning it) did this and scared the hell out of me.

    It was pretty darn loud, and happened every time the iMac woke up from sleep.

    If it was a hot day and I was doing something GPU/CPU intensive I might accept it, but on a normal cool evening waking up from sleeping when it had effectively been doing nothing?

    It did spin down eventually (after 30-45s), but I did feel it was a cause for concern as I've never read about this happening.

  2. macgenius1 macrumors newbie

    Jul 14, 2011
  3. stridemat Moderator


    Staff Member

    Apr 2, 2008
    Mine does a small fan spin up (barely audible) and then reduces down to nothing.
  4. basher macrumors 6502


    May 27, 2011
    Glendale, AZ USA
    Silent upon wake. 2011 27" iMac with SSD+2 TB HDD

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