Fix Error Code 100093 in macOS Sequoia

In the ever-evolving landscape of macOS, Apple has brought about a slew of new features in the recent upgrade of macOS Sequoia but, meanwhile, also some challenges. A few users of our BuhoNTFS, a neat utility app made to allow full read and write access to NTFS disks on Mac, have encountered an intriguing issue denoted as error code 100093.

In this blog article, we aim to explore this common Mac error 100093, find out its potential causes, and offer you solutions based on our thorough investigations and experiences.

Issue Description

After conducting intense online research, we found user feedback complaining about this error code 100093. We found that it appears to be related to file-handling issues in macOS Sequoia when interacting with external NTFS drives using NFS (Network File System) protocols. The error manifests in a few distinct ways, primarily affecting file transfer and management operations, which are crucial for users relying on seamless cross-platform file migration.

How We Investigated This Issue

Upon upgrading to macOS Sequoia, our testing teams and several users reported anomalies when attempting to write files to NTFS disks mounted through BuhoNTFS. Here’s a detailed breakdown of the symptoms and our diagnostic process:

1. File Transfer via Finder

First up, we copied files directly to an NFS-mounted NTFS directory resulting in the files being created but remaining empty, coupled with an immediate display of Error Code 100093. This issue points towards a problem in the Finder’s handling of file writes to NFS shares in the new macOS Sequoia environment.

2. Terminal Copy

When files are transferred using the cp command in the terminal, the file content is written correctly to the destination as we expected. However, an error pops up saying it’s unable to write extended attributes.

We concluded that even if the primary file data transfer is successful, we still have issues with metadata or the extended file system attributes under the new macOS Sequoia.

3. Folder-Based Transfer

The last thing we found interesting is that, when we put files within a folder and then transfer the entire folder either via Finder or terminal, the 100093 error does not occur. This workaround implies a possible bug or oversight in how macOS Sequoia handles file metadata when files are written individually versus in batches (folders).

Potential Causes of Error Code 100093

Based on our findings and technical insights, the causes of Error Code 100093 might include:

• Changes in NFS Handling: macOS Sequoia could have introduced changes in how NFS handles file transactions, particularly affecting NTFS volumes.
• Extended Attributes Errors: The new OS might handle extended attributes differently, which is crucial for NTFS due to its compatibility layer with macOS.
• File System Permissions: There could be tighter security or altered permissions handling in macOS Sequoia, affecting external drives.

Solutions and Workarounds

While Apple may need to address this issue in an upcoming update, we can probably meet a fix in macOS Sequoia 15.1. Before that, here are steps BuhoNTFS users can take to mitigate this problem:

1. Use Terminal for File Transfers: Utilize the terminal cp or mv commands for transferring files, which avoids the Finder bug.
2. Transfer Files in Folders: Group files into folders before transferring them, as this method consistently bypasses the error.
3. Contact Support: If the issue persists, contacting our support team can provide more personalized troubleshooting based on your specific setup.

The Bottom Line

We are actively working with technical experts and Apple to resolve this issue and will keep our users updated through our support channels and future blog posts. We appreciate the patience and support of our community as we work to enhance your experience with macOS Sequoia.

For further support, please reach out to our help desk, and follow our blog for more updates on this issue and other insightful guides on making the most out of your NTFS drives on macOS.