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  1. #16
    high sierra back to sierra? can it be done? how?
    IWT's Avatar
    Member Since
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    Born in Scotland, Worked in Scotland then England, Now live in Wales
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    Your Mac's Specs
    Late 2015 5K 27-inch Retina iMac, 4GHz i7, 32GB RAM, 1TB Flash Drive, macOS High Sierra 10.13.6
    Quote Originally Posted by macgig View Post
    yep I have the spinning platter HD. I never shut mine down always use sleep mode, which worked fine with Sierra. but yes, that is an option I suppose.
    It takes courage at first because it intuitively implies that the Drive will give out sooner; but in fact, this is not the case.

    Spinning up your Drive from rest (asleep or off entirely) stresses the Drive with each power surge.

    And remember companies like Backblaze leave their spinning HDs on 24/7 for many months, or even years, at a time - in fact provide quarterly statistics on the failure rate of their Drives.

    So no harm doing this - arguably better for Drive longevity.

    Ian
    Ian

  2. #17
    high sierra back to sierra? can it be done? how?
    Slydude's Avatar
    Member Since
    Nov 16, 2009
    Location
    North Louisiana, USA
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    13,560
    Your Mac's Specs
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone XS, 2015 iMac 16 GB 10.14.1 beta
    I've rarely had a problem with wake from sleep and bluetooth keyboards and mice. I bouht by first wireless keyboard shortly after the wireless keyboard came out. The only time I have had problems is with some of the cheapter third-party keyboards. As the batteries got low some are slow to wake up themselves and thus slow to wake the Mac.

    Does the keyboard drop its bluetooth connection often or is that staying intact? My first Apple keyboard started acting up (dropped connections, difficulty repairing, failure to wake up) after having been dropped onnto a hard floor numerous times over the years.

  3. #18
    high sierra back to sierra? can it be done? how?
    pm-r's Avatar
    Member Since
    Oct 16, 2010
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    Brentwood Bay, BC, Canada
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    You may or may not like this "solution", but I have an iMac similar in age and broadly similar in specs. I rarely use sleep mode or shut down completely.

    One of the problems when trying to solve the Mac wake-up problem is determining whether the Mac was actually sleeping or maybe even Off, or is it the display just not coming back on. The effect appears to be the same, but the cause could be different.

    And even though the wireless keyboards are often blamed, the same problem also exists with a lot of the portable Mac models with their built-in keyboards.

    So is the Mac actually just still sleeping or is the display just not turning on???





    - Patrick
    ======

  4. #19
    high sierra back to sierra? can it be done? how?
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
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    5,354
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    I have a mini, and never use sleep. I have "Prevent computer from sleeping automatically when the display is off" checked and "Put hard disks to sleep when possible" unchecked.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  5. #20
    high sierra back to sierra? can it be done? how?
    pm-r's Avatar
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    Oct 16, 2010
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    Brentwood Bay, BC, Canada
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    @Ian
    You may or may not like this "solution", but I have an iMac similar in age and broadly similar in specs. I rarely use sleep mode or shut down completely.

    I run my iMac 24/7 with "Turn display off after 15 minutes".



    Ian, just to be clear, do you have Energy Saver set to "Never" for your drive, and 15 minutes for your display?





    - Patrick
    ======

  6. #21
    high sierra back to sierra? can it be done? how?
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
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    I have a mini, and never use sleep. I have "Prevent computer from sleeping automatically when the display is off" checked and "Put hard disks to sleep when possible" unchecked.

    I used to do the same with my iMac and then discovered that regardless of the settings, some hard drives will still spin down on their own accord regardless, but usually after a prolonged delay with no usage.

    Touching wood here, but I have never really had any problem with my Mac's wake up, except now, more often than not, only a press on the Space Bar works when pressing on any key or moving the mouse would always wake things up. Not always guaranteed lately, and that's even with using old Mavericks.


    @macgig
    I would definitely do a SMC reset with that iMac of yours. Then just do a quick check on your System Preferences Pref Panes like Date and Time and Start Up Disk etc. They often get reset to some default setting.





    - Patrick
    ======

  7. #22
    high sierra back to sierra? can it be done? how?
    IWT's Avatar
    Member Since
    Jan 23, 2009
    Location
    Born in Scotland, Worked in Scotland then England, Now live in Wales
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    4,848
    Your Mac's Specs
    Late 2015 5K 27-inch Retina iMac, 4GHz i7, 32GB RAM, 1TB Flash Drive, macOS High Sierra 10.13.6
    Quote Originally Posted by pm-r View Post
    @Ian





    Ian, just to be clear, do you have Energy Saver set to "Never" for your drive, and 15 minutes for your display?





    - Patrick
    ======

    Correct. But in later iterations of macOS, the nomenclature has changed. This is how I have Energy Saver set:

    Screen Shot 2018-12-01 at 7.09.30 pm?.png

    Easier shown than said in words.

    Ian
    Ian

  8. #23
    high sierra back to sierra? can it be done? how?
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
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    Easier shown than said in words.

    Ian


    MUCH!!!

    Thanks Ian,

    Much clearer as well as different.





    - Patrick
    ======

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