Fix! File System Check Exit Code Is 8

The file system check exit code is 8 is a well-known issue that appears on the MacBook and is faced by numerous users all around the world, and usually, it appears while utilizing the external drive on Sierra. Individuals report this issue when they attempt to run some certain apps on their Mac, and this problem emerges on their screen, stopping them from performing a certain task they were attempting to accomplish.

What Triggers The ‘File System Check Exit Code Is 8’ Error?

This issue appears because of diverse reasons in the diverse cases, a few of which, the most common reasons are as follows:

  • This problem can appear if your Mac startup drive that is actually loaded with some Junk file.
  • Wrongly configured system settings can also be the cause of this error.
  • This problem may be triggered because of the corrupt Mac system files.
  • Out-of-date Mac apps can also trigger this error.

Try Out These Fixes:

You can try the following fixes to resolve this issue easily:

Fix#1: Running First Aid In The Recovery Mode Of Your MacOS 

First Aid is a program that incorporated the Macintosh OS for checking and fixing the file system issues on the external hard drive, Macintosh HD, SD card, flash drive, USB drive, and memory card, etc.

  • First of all, switch your Mac system on by simply hitting the power button.
  • After that, hit and hold the Command + R buttons right away upon hearing the startup ring > hold these buttons until you see a spinning globe or the Apple logo.
  • Then, in the Mac recovery mode, simply choose Disk Utility from the macOS Utilities.

macos utility

  • Choose your corrupted drive from the left-hand side panel of the Disk Utility.
  • Next, click on the First Aid button from the top of your Disk Utility window.

first aid

  • Now, click on the Run button to start the repair on a particular drive.

Fix#2: Updating Your App That’s Triggering This Issue

If you’re utilizing certain programs and apps, then it signifies the respective program is accountable for this error. If an app gets outdated or corrupted that is not compatible with the OS or other installed apps, the issue might appear. So you have to upgrade or repair such programs to resolve this issue. Here’re some steps for upgrading the Mac system and programs installed to the most recent version:

  • First of all, navigate to the Apple menu > simply launch the App Store.
  • After that, locate the Updates option > click on it.
  • Check for all the accessible updates > click Update All for installing all these available updates.

Fix#3: Erasing Your Drive

You can simply erase the corrupted drive for resolving the file system check exit code is 8 problem. Follow these steps to do so:

  • First, go to the Applications folder > open Utilities > navigate to Disk Utility.
  • After that, click on the icon for your corrupted drive from the left-hand side panel of the Disk Utility.
  • Then, click on Erase from the top of your Disk Utility window.

erase disk

  • Enter the name, choose the file system > click on Erase. The Disk Utility will start erasing your drive. After this process is finished, this error will be resolved.

Fix#4: Running The FSCK Command

If this problem still appears on the system, boot your system in the single-user mode and simply run this file system check command. Follow these steps for carrying out this task.

  • Reboot the Mac system > enter the single-user mode by simply hitting the Command + S buttons from the keyboard while your system boots.
  • Enter the ‘/sbin/fsck –fy’ command in the opened terminal.


  • If no issue is located throughout the check, then simply enter the ‘reboot’ command in the opened terminal > hit enter.
  • Now, you’ll be taken to the sign-in screen. Enter the essential details and check whether the error is fixed.

Fix#5: Reinstalling MacOS

If this error message still emerges on the Mac, then simply try to install the macOS again to make certain that this problem gets resolved on the OS.

  • First of all, reboot the Mac > enter the recovery mode by simply hitting the Command + R buttons from your keyboard while your system boots.
  • Now, a menu will emerge showing different options; simply choose the Reinstall Mac OS option > click on Continue.

reinstall macos

  • Now select the Mac hard drive, which is usually Macintosh HD/SSD, but it can be some other hard drive on your system.
  • Install your operating system by simply following the instructions that appear on your computer screen.

Fix#6: Data Recovery

As a competent Mac data recovery program, M3 Data Recovery for the Mac system can recover your lost data from the formatted drive, recover all of your removed files emptied from Trash, recover your lost data from the unmounted drive, recover the lost data from the unreadable drive, recover the lost data from your lost/deleted APFS partition, recover your lost data from the corrupted drive, and recover your lost data from the encrypted APFS drive, etc.

  • First of all, download, install and open the M3 Data Recovery program for Mac on the Mac system.

data backup

  • Then simply choose your corrupted drive for starting the scanning process of your data from your corrupted drive.

choose hard drive

  • After the scanning process is finished, please preview/check your found files > simply choose the found files you want to recover > click on the Recover option to save them.


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