Volume Optimizer


Mac disk repair software

Internal and External Mac Hard Drive Repair Application

This software repairs your corrupt Apple Macintosh HD and rebuilds its directory structure. Stellar Volume Optimizer mends external hard drives including your Mac formatted Solid State Drives.

    • Works on 10.6, 10.7, 10.8, 10.9, 10.10, 10.11 and 10.12
    • Recreates HFS formatted disk directory structure
    • Repair corrupt disk permissions on startup drive i.e. Mac HDD
    • Creates bootable media to repair Macintosh HD (Startup drive)
    • Saves Mac hard drive from going into inconsistent state using Journaling
    • Repair Invalid B-Tree Node Size problem on Mac hard drives
*Free Download allows free evaluation of the Mac disk repair software. To repair the drive user needs to register the tool


Processor: Intel
Operating System: macOS Sierra 10.12, 10.11, 10.10, 10.9, 10.8, 10.7 and 10.6
Memory: 1 GB
Hard Disk: 50 MB of free space

When to use Volume Repair tool?

  • When Disk Utility fails to repair your Mac hard disk drive and flashes the message “Disk Utility can’t repair this disk. Backup as much data as possible
  • When Macintosh HD fails to perform accurately and you know the hard drive is near failure. It throws back messages such as – “The volume Macintosh HD could not be repaired”, “mac hard drive cannot be repaired” etc.
  • When your external hard drive or SSD is logically corrupt. Also, FSCK Mac command doesn’t fix the drive
  • To repair corrupt or bad disk permissions on Mac boot volume
  • To rebuilding catalog b-tree on Mac hard drive
  • Tutorial – to create bootable USB for repairing Macintosh HD. Read More
  • Important: Mac Platinum Edition consists of Data Recovery and Drive Repair Applications

List of Mac Disk Errors that Volume Optimizer tool can fix?

  • Invalid node structure
  • Invalid key length
  • Invalid directory item count
  • Invalid extent entry
  • Invalid extent entry
  • Invalid record count
  • Invalid index key
  • Invalid B-tree node size
  • Invalid leaf record count
  • Invalid volume file count
  • Invalid volume free block count
  • Invalid volume header
  • Incorrect number of thread records
  • Incorrect number of extended attributes
  • Invalid node height
  • Incorrect block count for file and more…

How to Repair Invalid B Tree Node Structure on Mac

Stellar Volume Optimizer Screenshots?

features repair corrupt Mac disk secondary volume select startup volume select secondary partition

*Free Download allows free evaluation of the Mac disk repair software. To repair the drive user needs to register the tool