Slim iMac having issues after hard drive replacement

Discussion in 'iMac' started by nighthawk01, Aug 10, 2017.

  1. nighthawk01, Aug 10, 2017
    Last edited: Aug 10, 2017

    nighthawk01 macrumors newbie

    Joined:
    Feb 2, 2014
    #1
    So a Late 2013 iMac I bought has been having quite severe issues. The hard drive has been replaced with a Toshiba hard drive, so the temperature sensor does not work correctly - therefore setting off the fans. This is corrected with the 'SSD Fan control' but the computer still runs terrible. Worse than a plastic MacBook that I have for comparison. The computer is indexing but that cannot equate to kernel_task taking a supposed 300% of the CPU! Not sure where to go next, as I got the computer at a steal and it is in overall excellent condition.
    Thanks.

    EDIT: After removing 'AppleSMCLMU.kext' as well as editing the 'IOPlatformPluginFamily.kext' the computer now functions perfectly.
     
  2. nambuccaheadsau macrumors 65816

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #2
    Is this the 27" model? If so suggest a heat sensor kit from OWC.

    For mine all artificial fan control software can lead to problems.
     
  3. nighthawk01 thread starter macrumors newbie

    Joined:
    Feb 2, 2014
    #3
    It's the 21.5, I'll think about getting the heat sensor kit but meanwhile the computer runs cool and quickly.
     
  4. nambuccaheadsau macrumors 65816

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #4
    The 21.5" models do not need the kit as they went to 2.5" drives to overcome the problem in 2012.
     
  5. nighthawk01 thread starter macrumors newbie

    Joined:
    Feb 2, 2014
    #5
    So would it technically be impossible to replace a hard drive in a 21.5" natively without experiencing fan issues?
     
  6. iMacC2D, Aug 10, 2017
    Last edited: Aug 12, 2017
  7. nighthawk01 thread starter macrumors newbie

    Joined:
    Feb 2, 2014
    #7
    From what I've heard the computer had its drive replaced and then it was completely cleaned. I can't see how a sensor would start malfunctioning - which leads me to believe the sensor is simply missing from the replacement, which was causing the computer to crank the fan up.
     
  8. iMacC2D, Aug 10, 2017
    Last edited: Aug 12, 2017
  9. nambuccaheadsau macrumors 65816

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #9
    Just the opposite nighthawk simply replace the 2.5" hard drive and no problems if everything has been re-connected properly and no sensor kit needed. I think a sensor may well be unconnected or need tighter clipping together.
     

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