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  1. #1


    Member Since
    Jun 10, 2008
    Posts
    93
    iMac keeps randomly waking up?
    Hello,

    I leave my wife's iMac on Sleep all the time.
    However, I've noticed lately that it'll randomly wake itself from sleep (for no apparent reason). I go to the iMac and see if there is any pop-up or activity going on on the screen, but nothing.

    Anybody else having this problem, or know of why this might happen (and how to fix it)?

    Thanks,

    Justin

  2. #2


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    Yes. Here you go:



    Note that the "lock" needs to be unlocked using your admin password to make changes FIRST. Then UNcheck the box that says "wake on Ethernet." Done.

  3. #3


    Member Since
    Jun 10, 2008
    Posts
    93
    Quote Originally Posted by chas_m View Post
    Yes. Here you go:



    Note that the "lock" needs to be unlocked using your admin password to make changes FIRST. Then UNcheck the box that says "wake on Ethernet." Done.
    Just looked into this solution and that "Ethernet" box IS already unchecked.
    Any other thoughts?

    Thanks,

    J.

  4. #4


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    Have you got a connected Time Machine drive or Time Capsule router?

  5. #5


    Member Since
    Jun 10, 2008
    Posts
    93
    Quote Originally Posted by chas_m View Post
    Have you got a connected Time Machine drive or Time Capsule router?
    Nope.

    Could I have some sort of cookie or tracker that's kicking the system on to report data on me?

  6. #6


    Member Since
    Jun 10, 2008
    Posts
    93
    It seems to be getting worse.

    It woke itself up last night and so I decided to see if maybe turning off WiFi would change anything....Nope...it woke itself up 4 more times in the span of an hour.

    ANY ideas as to what is going on?
    I've never seen anything like this on any of my Macs.

    Thanks,

    Justin

  7. #7

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,236
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    It could be several things:

    1. Background activity. Use your activity monitor to check and also take a look at your activity logs to see what was going on when it woke up.

    2. Since it's an iMac, it's susceptible to AC line hits (power glitches) which will also wake it up. I use an UPS with my iMac which provides backup power in the event of a power failure. It also helps to smooth out any line variations that may occur.

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