First Aid Failed.

Started 5 months ago | Discussions thread
Tom_N Forum Pro • Posts: 18,544
Re: First Aid Failed.

"8 indicates a corrupt filesystem was found during a check, or repairs did not succeed. That's it."

You might be able to repair the filesystem using fsck from the CLI in single-user mode.

In the past, some commercial third-party tools have had much better success than Disk Utility at fixing corrupted filesystems.  I have read that in recent versions of macOS, many of these tools now have their own GUIs – but call a common macOS API to do the repair work, possibly erasing some of their former advantages.

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