[Solved] How to fix 'file system check exit code is 8' on Mac?
'file system check exit code is 8' indicates a corrupt file system was found during a check, it is caused by a sudden power failure, virus attack, catalog file corruption, invalid volume header and much more. Therefore, try to solve 'file system check exit code is 8' by following solutions.
Solution 1: Run First Aid in recovery mode
Step 1: Turn on Mac computer by pressing Power button.
Step 2: Press and hold Command+R keys immediately upon hearing the startup chime. Hold the keys until you see the Apple logo or a spinning globe.
Step 3: Select Disk Utility from macOS Utilities in Mac recovery mode.
Step 4: Select the corrupted drive from the left panel of Disk Utility.
Step 5: Click "First Aid" button on the top of Disk Utility window.
Step 6: Click "Run" button to start the repair on the specific drive.
If First Aid fails to repair unreadable disk, please go to solution 2 to recover data from corrupted drive.
Solution 2: Data recovery
As a professional Mac data recovery software, M3 Mac Data Recovery can recover deleted files emptied from Trash, recover data from formatted drive, recover data from unreadable drive, recover data from unmounted drive, recover data from corrupted drive, recover data from deleted/lost APFS partition, recover data from encrypted APFS drive, etc. on macOS 10.14 Mojave/10.13 High Sierra/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7.
Step 1: Download, install and launch M3 Mac Data Recovery software on your Mac computer.
Step 2: Select the corrupted drive.
Step 3: M3 Mac Data Recovery software is scanning the data from the corrupted drive.
Step 4: After the scan completes, please check/preview the found files, then select the found files you expect to recover and then click Recover to save them.
Solution 3: Erase the drive
After data recovery is successfully done from corrupted drive, we can erase the corrupted drive to fix 'file system check exit code is 8' error on macOS Mojave 10.14/High Sierra 10.13/Sierra 10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7 with the following steps:
Step 1: Open Applications folder -> Utilities -> Disk Utility.
Step 2: Click the icon for the corrupted drive on the left sidebar of Disk Utility.
Step 3: Click the Erase button at the top of the Disk Utility.
Step 4: Enter the name, select file system and then click the Erase button, Disk Utility will start erasing the drive. After completing to erase the corrupted drive, 'file system check exit code is 8' error will be fixed.