After investigating this particular issue, it turns out that there are several different scenarios that might trigger this error code. Here’s a shortlist of culprits that might be responsible: Now that you know every potential fix that might trigger this error code, here’s a list of methods that might allow you to fix this issue:
Method 1: Repairing the Disk via the Terminal App
If you’re encountering this issue while trying to run the First Aid utility on the affected drive, you should attempt to do the repairs via the Terminal app. Several affected users have confirmed that they’ve been able to fix the issue by opening the built-in Terminal app and running a command capable of repairing the drive remotely. This particular issue is confirmed to work on a wide variety of macOS versions including ElCapitan, Sierra, High Sierra, and Mojave. If you haven’t tried this type of fix yet, follow the instructions below: In case this workaround didn’t allow you to fix the issue in your particular case, move down to the next potential fix below.
Method 2: Using a Machine Backup
According to some affected Mac users, you might be able to reverse the corrupted files that are triggering the ‘Invalid node structure – The volume Macintosh HD could not be verified completely’ error by mounting a previously created machine backup in order to restore the Mac state back to a point where everything was functioning properly. Of course, this will only work as long as the problem is not rooted in a hardware issue. The only requirement of this method is for you to have a previously created Time Machine backup (either on a physical disk or via the Time Capsule utility). If you meet the requirements above, follow the instructions below to attempt to restore your macOS files back to a healthy state in which this First Aid utility error code was not occurring: In case the same Invalid node structure – The volume Macintosh HD could not be verified completely error is still interrupting the operation, move down to the next potential fix below.
Method 3: Boot in Recovery mode and Reinstall macOS
If none of the methods above, you have one more potential fix left before giving up and concluding that you’re dealing with a hardware issue is to boot up your Mac from Recovery mode and reinstalling macOS. Of course, this is not ideal in situations where you have a lot of important data on your OS drive and you don’t have a backup in place. But it still beats not being able to boot up at all. In case you find yourself in this particular scenario, follow the instructions below to force your Mac into Recovery mode and then use the macOS Utilities menu to Reinstall macOS. Several affected users have confirmed that this fix was the only thing that helped them fix the ‘Invalid node structure – The volume Macintosh HD could not be verified completely’ error. Here’s a step-by-step guide that will walk you through the whole thing: In case the same kind of error is still popping up, you have no choice but to conclude that you’re actually dealing with a hardware issue.
Method 4: Take your Mac for Repairs (If applicable)
In case you’re seeing this error code with an OWC drive, I’m sorry to say this but, you’re most likely dealing with a hardware issue. Several affected users dealing with this same issue have confirmed that taking the HDD / SDD to a certified technician only meant the confirmation that the drive was irreparably busted. If you find yourself in this particular scenario, you have 2 ways forward:
If your Mac Computer is under warranty, contact Apple or the authorized reseller you made the initial purchase from to get a replacement.Get a replacement for your faulty OWC drive.
If you choose the second option, keep in mind that you should first go through some steps to ensure that you’re actually dealing with a faulty drive.
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