Fixing "Invalid node Structure" on Mac HDDs (3 of 3)

Method 3 : Using bootable Disk Warrior (Paid) USB to rebuild the node structure.

If everything fails, the only option left is to use a data recovery application which can scan and recover as much data as possible. Disk Warrior 4 is one such application which saved the day for me. You can either use a bootable DVD or create a bootable USB as shown below.

1. Get your copy of Disk Warrior 4 and mount the .CDR image from Disk Utility from Mac Recovery.
2. Partition a external USB pendrive to match the partition on mounted Disk Warrior image.

3.- Boot from your Disk Warrior bootable disc from Mac Startup Manager.

4.- Use the Rebuild option to start the recovery process.

5.- Let the process complete.

6.- Once completed you will be presented with a scan report, carefully read everything and if you are satisfied proceed with replacing of corrupt node structure catalog with the one recreated by Disk Warrior. This will result in data loss of unrecoverable files/folders, so make sure this is what you need done

7.- If you used the Replace button in the step above, Disk Warrior will go ahead and do the replacement.

Anyone single method shared above can work for you, for me Method 1 allowed me to boot into Windows and use Method 2 to backup data from HFS volume and Method 3 fixed the Apple Mac OS X boot issue.

Devin S.