5k iMac not recognizing APC UPS

Discussion in 'iMac' started by eoren1, Mar 30, 2016.

  1. eoren1 macrumors 6502

    Aug 17, 2007
    I'm not sure when this started but I noticed in Energy Saver the other day that I no longer had any settings related to the UPS device that my 5k 27" iMac is plugged into. I never installed APC's software and would prefer to use OS X's built in monitoring software.
    1. This was present on 10.11.3 and continues after updating to 10.11.4.
    2. I tried an SMC reset and changed the usb cable - neither worked.
    3. USB cable is plugged directly into the iMac (not to hub).
    4. Plugged the USB cable into a Macbook and it instantly showed the UPS was connected in System Profiler and in the Energy Saver settings.
    Any suggestions on getting the iMac to recognize it is plugged to a UPS?

  2. eoren1 thread starter macrumors 6502

    Aug 17, 2007
    Called Apple Support
    Went through the above and suggested reinstall as only thing left to do.
    What do you know...it worked!
  3. eoren1 thread starter macrumors 6502

    Aug 17, 2007
    Fix was only temporary...

    So, as above, a reinstall seemed to work.

    However, at some point, the iMac again stopped recognizing it was attached to the APC UPS.

    I thought it might have been installation of the SoftRAID driver but I contacted their tech support who assured me there was absolutely no way it would cause this behavior.

    Any thoughts? Anyone else with this situation?


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