3 Workable Methods to Fix Invalid B-Tree Node Size on Mac and Retrieve Lost Files

Last Updated on January 16, 2023 by Yulia Ilina

When you need to fix some app crashes or regular systems with First Aid on Mac, your MacBook ends with the error Invalid Node Structure on your Mac. What should be the problem? How to fix the utility error on Mac and restore the lost files? Just learn more about the 3 efficient and workable methods from the article.

Fix Invalid B-Tree Node Size on Mac

Part 1: What Does Invalid B-Tree Node Size Mean

B-Tree is a file for the unique entry for the file on the index table when you save any file on your Mac. When you need to access the file, then Mac will navigate to the file to locate the saved file accordingly. If there is damage to the B-Tree files, you will get an error message Invalid B-tree node size. This disk needs to be repaired.

Whether the problem is related to the broken B-tree structure, file corruption, file system corruption, or simply inappropriate shutdown, you can reform your MacBook to fix the problem efficiently. But is there a better alternative for keeping the original files with erasing? How to recover the deleted files after restoration?

Part 2: 3 Efficient Methods to Fix Invalid B-Tree Node Size on Mac

Instead of reforming your MacBook directly, here are 3 workable methods to fix B-Tree Node Size error on Mac without losing original quality. Just follow the detailed process below.

Method 1: Run FSCK Command in Single User Mode

When you need to run FSCK (File System Consistency Check), it will check your Mac internal disk or external hard drive and repair B-Tree Node Size-related problems. But you have to be familiar with the command lines of the FSCK beforehand.

Step 1: Make sure your MacBook is running in single-user mode. Start or restart your MacBook by holding the Command + S key combinations to run into the Mac Single User Mode.

Step 2: When you get to the command prompt at the bottom of the screen, you can type the command /sbin/fsck -fy, then press the Enter key to start the file system check process.

Step 3: It will run a diagnostic on your internal drive to repair the B-Tree Node Size-related problems. When you get the message that The volume appears to be OK, you can restart your MacBook.

FSCK Command Mac

Method 2: Fix Invalid B-Tree Node Size via Disk Utility

Disk Utility is another inbuilt app to fix the Invalid B-Tree Node Size problem. It can check for and fix errors related to the formatting and directory structure of your Mac. To check and repair the related issue, you can run First Aid on each volume and container beforehand.

Step 1: Click the Apple menu and choose the Restart button. Press both the Command key and the R key until the Apple logo appears. After that, you can release the keys.

Step 2: Choose the Disk Utility app and click the Continue option. Choose the hard disk with the Invalid B-Tree Node Side error in the sidebar. Select the First Aid option from the menu selection.

Step 3: Click the Run button to perform a disk check to solve the Invalid B-Tree Node Size problem. Choose the Show Details option and you can see the state of your disk.

Disk Utility Mac

Method 3: Reformat to Fix Invalid B-Tree Node Size

If you cannot solve the Invalid B-Tree Node Size with the above methods, you can also reform the hard drive to fix the problem. Make sure you have already backed up the files with Time Machine. It will erase all data on the drive during the process.

Step 1: Just double-click the Disk Utility application in the Utilities folder of Applications if you need to erase any other type of storage device that has the Invalid B-Tree Node Size error.

Step 2: Choose the Show All Devices option from the View menu. In the sidebar, select the storage device you want to erase. After that, click the Erase button to reformat the device.

Step 3: Click the Format popup menu to choose a file system format. You can enter a name after reformatting it in the Name field. Click the Erase button to fix the problems and remove all files.

Reformat Mac Hard Drive

Part 3: How to Retrieve Files for Invalid Node Structure Error on Mac

If you have to reformat the hard drive to fix the Invalid B-Tree Node Size problems, how do you retrieve deleted files back on your Mac? Data Recovery for Mac is a versatile choice to retrieve the deleted files for different scenarios, including hard drives, digital cameras, flash drives, and more. Moreover, it enables get photos, videos, documents, and others within a few clicks.

1. Recover lost files after reformatting due to Invalid B-Tree Node Size.

2. Get back the deleted files from both the inner and external hard drives.

3. Search desired files due to the specific data type and hard disk drive.

4. Preview the recovered files of each data before making your decision.

Win Download Mac Download

Step 1: Download and install Data Recovery for Mac. Launch the program on your MacBook and choose the Mac Data Recovery button. Disable System Integrity Protection to make sure you can retrieve the lost or deleted files after reformatting due to the Invalid B-Tree Node Size error.

Mac Data Recovery

Step 2: Select lost data types, such as images, audio, video files, emails, documents, and more. After that, you can choose the desired disk drive or external hard drive you want to get back the lost files. Just click the Scan button to have a quick scan on your Mac.

Scan Mac

Step 3: After the scanning, you can find the retrieved files after the Invalid B-Tree Node size reformatting. Search the lost data and preview the details on the right window. When you need to retrieve the files, you can simply click the Recover button to extract the files.

View Data by Path List Win Download Mac Download


When you need to fix the Invalid Node Structure issues on Mac, here are the workable choices you should try. If you need to solve the problem without losing data, the FSCK command and Disk Utility are suitable choices. Of course, you can simply reformat the hard drive to turn everything back to normal and use the advanced Data Recovery to find the deleted or lost files on your MacBook.