claude-code - 💡(How to fix) Fix [BUG] Claude Cowork: Claude Code process exited with code 126 on macOS Tahoe 26.4 — version 1.1617.0 [1 comments, 2 participants]

Error Messages/Logs

TL;DR

The issue with Cowork being non-functional due to the Claude Code process exiting with code 126 may be resolved by investigating compatibility issues with the latest version of Claude Code and macOS Tahoe 26.4.

Guidance

• Verify that the issue persists across different Claude models, such as switching from Sonnet to another model, to isolate if the problem is model-specific.
• Check the system logs for any additional error messages that may provide more context about why the Claude Code process is exiting with code 126.
• Attempt to start a session in a different environment, such as a different macOS version or a virtual machine, to see if the issue is specific to the current setup.
• Consider reaching out to the development team or support for further assistance, as the issue is reported as a regression and may require specific patches or updates.

Notes

The lack of information about the last working version and any additional details limits the ability to provide a more targeted fix. The guidance provided is based on the information given and aims to help narrow down the cause of the issue.

Recommendation

Apply workaround: Given the regression nature of the issue and the lack of a clear fix, applying a workaround, such as potentially downgrading to a previous version of Claude Code if possible, or waiting for an update that addresses the compatibility issue with macOS Tahoe 26.4, seems like the most viable option.