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Question: problems after high sierra

Is there a fix for the sleep - restart high sierra issue?

MacBook, iOS 10.3.1

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Nov 12, 2017 11:01 AM in response to lcoc In response to lcoc

Please give this a try:


Use Users & Groups preference pane to create a new Admin user account. Change the startup account to this new account. Log out of your normal account and restart the computer. Select the new account at the login panel. After startup, try putting the computer to sleep. Does it restart or not?

Nov 12, 2017 11:01 AM

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Nov 12, 2017 2:55 PM in response to lcoc In response to lcoc

Boot into Safe Mode, Mac OS X: Starting up in Safe Mode, which will clean cases and run some repair procedures. Then reboot normally and check the sleep issue.


If the problem still persists boot into the Recovery volume (boot with the Command + R keys held down) and reinstall the system.

User uploaded file

Nov 12, 2017 2:55 PM

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Nov 12, 2017 3:20 PM in response to lcoc In response to lcoc

In that case, I recommend backing up your files, erasing the drive, and reinstalling macOS.


Install El Capitan or Later from Scratch


Backup if possible before continuing.


  1. Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
  2. Select Disk Utility from the Utility Menu and click on Continue button.
  3. When Disk Utility loads select the volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase icon in Disk Utility's main window. A panel will drop down.
  5. Set the Format type to Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Reinstall OS X and click on the Continue button.

Nov 12, 2017 3:20 PM

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Nov 12, 2017 3:24 PM in response to Old Toad In response to Old Toad

I will try to boot in safe mode after my back up is complete. If that doesn't work this is how to reinstall, correct?

Install macOS

Follow these steps after starting up from macOS Recovery:

  1. Choose Reinstall macOS (or Reinstall OS X) from the utilities window.
  2. Click Continue, then follow the onscreen instructions. You'll be asked to select your disk. If you don't see it, click Show All Disks.
    To verify eligibility to install macOS, your Mac serial number is sent to Apple, and you might be asked for your Apple ID.
  3. Click Install. Your Mac restarts after installation is complete.

If you erased your disk before installing, or you installed on an external drive or other new disk, your Mac restarts to a setup assistant.

  • If you're keeping your Mac, complete the setup assistant with your own information.
  • If you're selling or giving away your Mac, press Command-Q to quit the setup assistant without completing the setup steps. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.

Nov 12, 2017 3:24 PM

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Nov 12, 2017 8:03 PM in response to lcoc In response to lcoc

Restoring from your backup may install what is causing the problem, so I would do a fresh install as outlined in my previous post. You want a new system with nothing added. Test that. If the problem persists, then you may have a hardware problem. Perhaps defective memory.

Nov 12, 2017 8:03 PM

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Nov 13, 2017 3:12 AM in response to Kappy In response to Kappy

yes, i clicked the reinstall mac os, and after it was installed it asked if i want to back up from time machine so i did that and yes, still have problem. next time i will not do the time machine back up and will start with a brand new system. just wondering if i will be able to connect to my time machine back up for mail etc later, or maybe data will all reinstall from the cloud? at this point not really sure if i need the time machine back up at all but i'm sure there are things i'm not remembering...

Nov 13, 2017 3:12 AM

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Question: problems after high sierra