Snow Leopard making my iMac turn on and off?

Discussion in 'macOS' started by chocolate632, Sep 13, 2009.

  1. chocolate632 macrumors 6502

    Oct 27, 2007
    This is the most random problem I had with my Mac. I usually keep it on sleep, and last night at 1:30Am it wakes up. The drive spins, but the screen is black. The sleep indicator light turns off, then the computer puts itself back to sleep. It also happened twice this morning. What's going on here?
  2. superted666 Guest


    Oct 17, 2005
    I had this issue,

    I think its when you have wake on lan enabled.
    Something like ATV spins up your disks to check its still in sync maybe?
  3. chocolate632 thread starter macrumors 6502

    Oct 27, 2007
    I don't got an Apple tv, and where can you find the "wake On LAN" option? Is it enabled by default
  4. broken-chaos macrumors regular


    Sep 2, 2009
    Toronto, Ontario
    Wake on network access is found in the Energy Saver pane in System Preferences. Unchecking that option may prevent your computer from waking up as it's doing - as I do believe it's enabled by default.

    Attached picture shows the option (...I just had fun with Preview's Annotate option).

    Attached Files:

  5. chocolate632 thread starter macrumors 6502

    Oct 27, 2007
    Thanks. I'll post here again if it keeps waking up.
  6. ab2650 macrumors 6502a

    Jun 21, 2007
    I don't want to thread-jack, and I'll probably make a post of my own after I'm done searching, but...

    Anyone know of a way to keep WOL turned on but *not* have the computer intermittently wake up? I have a Mini as a media system in the bedroom and ever since it's been upgraded to SL, it wakes, clicks and whirs, then falls back asleep.
  7. 156457 macrumors 6502

    Jan 28, 2008
    when i had leopard my iMac used to wake up a lot, but since Snow Leopard I ALWAYS have to shut it down now. it drives me mad. it can't stay asleep for more than 15 minutes. :mad: I've reset the PRAM and SMC and all that, reinstalled Snow Leopard, googled, checked surge protectors. god it drives me mad.
  8. rockinstlouis macrumors newbie

    Jan 23, 2010
    Apple Support Article

    I didn't know why this happened until I found the article today..

    Half way down it says this.. check it out..

    "Macs that have Wake on Demand enabled will occasionally wake for a brief time, without lighting the screen, in order to maintain registrations with the Bonjour Sleep Proxy. On some Macs, sounds from the optical drive, hard drive, or fans may be heard during these brief maintenance wakes."

    So, if you want this feature on.. I.E, for ARD.. It looks like you'll have to deal..

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