Turn on system using UPS power switch

Discussion in 'Mac Pro' started by ajmichmac, Jun 3, 2019.

  1. ajmichmac macrumors member

    ajmichmac

    Joined:
    Mar 7, 2018
    Location:
    N.E. Michigan
    #1
    Is it possible to use a universal power supply (battery backup) to power up the mac without pushing the power button on the back of the display? IE, turn on the system when the UPS power is turned on...?
     
  2. drewsof07 macrumors 68000

    drewsof07

    Joined:
    Oct 30, 2006
    Location:
    Ohio
    #2
  3. saulinpa macrumors 6502a

    Joined:
    Jun 15, 2008
    #3
    Should do what you want by setting "Start up automatically after a power failure" in the Energy Saver preference pane. Works with my 5.1.
     
  4. crjackson2134 macrumors 601

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #4
    I think you’re suggesting omitting a normal controlled shutdown by simply cutting the power at the UPS, then letting the Mac detect a dirty power off, so that it will reboot when power returns. If that’s correct, it sounds like a bad idea to me.
     
  5. saulinpa macrumors 6502a

    Joined:
    Jun 15, 2008
    #5
    No. Do a clean shut down of your Mac. Then turn off the UPS. When you turn the UPS on your Mac will then boot up.
     
  6. ajmichmac thread starter macrumors member

    ajmichmac

    Joined:
    Mar 7, 2018
    Location:
    N.E. Michigan
    #6
    Hmmm, I am using an APC BackUPS... seems they don't offer a Mac version of their power manager. Damn.
    --- Post Merged, Jun 4, 2019 ---
    No, I shut down normally. It is the power up that I want to control with the UPS.
    --- Post Merged, Jun 4, 2019 ---
    Does not work with my iMac Pro 2017... ratz...
    --- Post Merged, Jun 4, 2019 ---
    As a test, I shut down normally but killed the UPS before the mac was completely shut down. THEN the UPS powers on the mac like I want. Since power cuts do happen (sans UPS), and presumably the OS is designed to handle them, can I assume there is no risk in stopping the shutdown before it is finished? FYI the boot took a bit longer than usual, possibly checking for corrupt files, but no error message was given and the system booted normally.
     

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5 June 3, 2019