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  1. #1
    Mini Won't Sleep
    hughvane's Avatar
    Member Since
    May 18, 2008
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    Mini Won't Sleep
    2018 Mini, OS Mojave 10.14.6

    Hi - cannot find reference going back ten days to this specific issue.

    Before the OS update of Security and Safari a few days ago, the Mini was programmed to go to sleep after 20 minutes of inactivity, the monitor with it.

    Since the update, whatever was last used remains visible on screen, remaining several hours if I happen to be away for that length of time, and I cannot seem to change that situation through SysPrefs.

    Anyone else, and what advice? Thank you.
    ABCDEFGHIJKLMNOPQRSTUVWXYZ
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  2. #2
    Mini Won't Sleep
    MacInWin's Avatar
    Member Since
    Jan 01, 2009
    Location
    Winchester, VA
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    7,924
    Your Mac's Specs
    MBP 15" Mid 2015, iPhone 11 Pro, an iMac, plus ATVs, AWatch, MacMini
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    Open Activity Monitor, go to Energy tab, look for column named "Preventing Sleep," click on column header to sort. Should see mostly "No" maybe a few blank and none "Yes." If there is a Yes, that is the app that is keeping it awake.
    Jake

  3. #3
    Mini Won't Sleep
    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Amberley, Canterbury, New Zealand
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    Your Mac's Specs
    MacMini 8.1 & 4.1, OS 10.14 & 10.11 & 10.6; Macbook Pro 8.2, OS 10.12.
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    Quote Originally Posted by MacInWin View Post
    Open Activity Monitor, go to Energy tab ... Should see mostly "No" .
    Thank you, all No, so that's not the cause.
    ABCDEFGHIJKLMNOPQRSTUVWXYZ
    Please post your Mac (or other) specs and MacOS version in your post, your profile or your signature. It helps us to help you better.

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  4. #4
    Mini Won't Sleep
    MacInWin's Avatar
    Member Since
    Jan 01, 2009
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    Winchester, VA
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    MBP 15" Mid 2015, iPhone 11 Pro, an iMac, plus ATVs, AWatch, MacMini
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    OK, so what have you tried already? You said "SysPrefs" but didn't say which. Have you rebooted? What starts at boot in your Login items? What in System Preferences have you set? Is it in a network? If it is, is "Wake for network access" ticked? Is "Enable Nap?" Given the easy solution didn't work, we start looking at the harder ones.

    - - - Updated - - -

    Have you reset the SMC?
    Jake

  5. #5
    Mini Won't Sleep
    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Amberley, Canterbury, New Zealand
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    3,399
    Your Mac's Specs
    MacMini 8.1 & 4.1, OS 10.14 & 10.11 & 10.6; Macbook Pro 8.2, OS 10.12.
    Rep Power
    14
    Answers in order of questions:
    1. Desktop & Screensaver, Energy Saver (which appears the most relevant and was used before the latest updates in Mojave), Displays
    2. Rebooted? Yes, no difference.
    3. Energy Saver - turn display off after 20 minutes, Wake for network access
    4. Network - local only
    5. Enable Nap? No, because I don't need any of the services listed
    6. SMC reset? No. Why might that be necessary? As explained, everything was working fine prior to the update, but that is the only thing I can think of that can have caused the change.

    This is not a major problem, more a nuisance. I can put the Mac to sleep manually and turn off the monitor, something I do overnight for example, but such is not always practicable, eg. should I leave to take a phone call, or a visitor (not happening at present!!!).
    ABCDEFGHIJKLMNOPQRSTUVWXYZ
    Please post your Mac (or other) specs and MacOS version in your post, your profile or your signature. It helps us to help you better.

    I'm leaving now to go and find myself. If I should return before I get back, please ask me to wait.

  6. #6
    Mini Won't Sleep
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
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    60,292
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    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Catalina
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    Why don't you try the SMC reset anyway. It's easy enough to do with a Mini and what have you got to lose?

  7. #7
    Mini Won't Sleep
    MacInWin's Avatar
    Member Since
    Jan 01, 2009
    Location
    Winchester, VA
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    7,924
    Your Mac's Specs
    MBP 15" Mid 2015, iPhone 11 Pro, an iMac, plus ATVs, AWatch, MacMini
    Rep Power
    29
    Here is a link to Apple's explanation of the function of the SMC: How to reset the SMC of your Mac - Apple Support

    One of the functions of the SMC is to manage the power system. Hence, reset sometimes fixes things related to power on/off.
    Jake

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