When using Disk Utility’s First Aid, I received the error message: “The volume MacHD was found corrupt and needs to be repaired,” with a file system check exit code of 8. It also shows an invalid volume free block count (should be 7209966 instead of 6940502). How can I fix this issue?
Have you tried restarting your Mac? Sometimes, a restart can help resolve the issue. If the problem persists after restarting, you can boot into single-user mode by holding Command + S during startup.
Then, enter the command /sbin/fsck -fy to repair the disk. If the system reports “File system was modified,” enter reboot to restart your Mac.
The most straightforward solution is to format the disk. However, if you have important data on the disk, it is recommended to use data recovery software to retrieve your important files first. I have used iBoysoft Data Recovery for Mac before, and it’s a professional data recovery software with high recovery efficiency. You can download iBoysoft Data Recovery for Mac and give it a try.