How to Fix Mac Random Shutdowns in High Sierra?

Nowadays, some Mac users are facing the problem of random High Sierra shutdown issue. It not just distracts people from their daily routine, but in general, demonstrates system incapacity to work properly. Here, we give you a scope of solutions how to solve the problem on your own without waiting for further updates. Hope, they will perfectly fit in your case.

Make Use of Bug Reporter

For starters, you’d better file a bug and provide the logs to the BugReporter. It’s a free Apple Developer Connection (ADC) for users, who run into troubles with Mac software. To get a free account, register on the page mentioned above.

Don’t Forget About Panic Reports

You can post system-generated panic reports on specialized forums so that experts or experienced users could have a look at them and advise you the way out. To get these reports, launch the Finder. Then press “Go,” afterward choose “Go to Folder,” and open /Library/Logs/DiagnosticReports. It’s worth noticing that panic report must maintain the word “panic” in the name.

Restart your Mac in a Safe Mode

Another variant is to restart your Mac in safe mode. The problem is, it prevents using a lot of apps and programs. Then you can try to restart in normal mode.

Try Apple Beta Testing

You can also sign up for the Apple Public Beta Testing program. It doesn’t handle the problem immediately, but don’t miss the chance to test the pre-release software and thus provide logs and bug reports to Apple.

Use Options of the Bootable Install Disk

Create a bootable install disk of High Sierra. By downloading the Sierra installer and afterward follow the commands, which put the installer on a thumb drive.  The next step, you need to take is restarting your Mac and booting to the thumb drive. Thus you’ll be able to install High Sierra. Don’t forget to create a backup copy, so you could without shaking erase and then install the software.

Test Mac OS Extended Journaled Formatting

After having booted your computer onto the boot drive (with a Sierra bootable disk) you have to choose the disk utility option to erase the hard drive. When it’s been done, you can then select “Mac OSX Extended Journaled” for the new formatting. The final step is to reinstall the High Sierra.

Apply Your Back-Up Copy While Restarting Your Mac

To try the next tip, you have to restart your Mac in recovery mode and enter the disk utility through recovery mode. You should be able to erase the drive and change the formatting within recovery mode. Once having fulfilled this task, try to restore from a Sierra backup (also while still in recovery mode). This variant is really rational for those, who don’t want to use the booting disk.


Pay attention to your SMC (System Management Controller) and PRAM (Parameter Random Access Memory). Resetting them may help you fix the problem of the random shutdown.

First Aid in Disk Utility May Be a Solution

You can restart your Mac in recovery mode, as mentioned before, but also perform the First Aid within Disk Utility.

Perform Diagnostic Tests

Another measure, you can take is performing Apple diagnostic tests in diagnostic mode respectively.

Try Something Else

  • Install Apple Supplemental Update and 10.13.1;
  • Reinstall High Sierra with the latest installer;
  • Check the hardware system to exclude all possible problems, which can lead to the abrupt shutdown in the High Sierra;
  • If the Mac, you use, is formatted with AFPS (Apple File System), you will have to apply a High Sierra bootable disk in order to reformat the drive. As long as you can reformat to Mac OS Extended (Journaled), it will help you to prepare your Mac for the downgrade. Reformat it, and then you can restore your it from a previous Time Machine backup of Sierra if you have one. This way is the easiest but still leads to inconvenience in use.

If nothing helps and shutdowns keep annoying you, don’t hesitate to contact Apple Support, take it to Apple Store for examining.