[BUG] [Cowork] VM fails to start - missing libmnl.so.0 after update to v1.1.1520

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Title:
[Cowork] VM fails to start - missing libmnl.so.0 after update to v1.1.1520

Body:

## Description

After updating to Claude Desktop v1.1.1520, Cowork fails to start with error:
> "Failed to start Claude's workspace - macOS isn't providing a network connection to Claude's
workspace."

Root cause: missing libmnl.so.0 library inside the VM image.

## Environment

• Claude Desktop: 1.1.1520
• macOS: 26.2 (Build 25C56)
• Architecture: Apple Silicon

## Error Log

From ~/Library/Logs/Claude/coworkd.log:
[coworkd] failed to bring interface up: exit status 127: ip: error while loading shared libraries:
libmnl.so.0: cannot open shared object file: No such file or directory

## Workaround (Confirmed Working)

1. Quit Claude Desktop completely
2. Delete VM bundle:

```bash
rm -rf ~/Library/Application\ Support/Claude/vm_bundles/

1. Restart Claude Desktop

This forces Claude to recreate the VM bundle, which resolves the issue.

Notes

• The user-facing error message is misleading (suggests macOS network issue)
• Likely an issue with VM image not being properly updated during app update

---

What Should Happen?

[Cowork] VM fails to start - missing libmnl.so.0 after update to v1.1.1520

Error Messages/Logs

Steps to Reproduce

Title:
[Cowork] VM fails to start - missing libmnl.so.0 after update to v1.1.1520

Body:

## Description

After updating to Claude Desktop v1.1.1520, Cowork fails to start with error:
> "Failed to start Claude's workspace - macOS isn't providing a network connection to Claude's
workspace."

Root cause: missing libmnl.so.0 library inside the VM image.

## Environment

• Claude Desktop: 1.1.1520
• macOS: 26.2 (Build 25C56)
• Architecture: Apple Silicon

## Error Log

From ~/Library/Logs/Claude/coworkd.log:
[coworkd] failed to bring interface up: exit status 127: ip: error while loading shared libraries:
libmnl.so.0: cannot open shared object file: No such file or directory

## Workaround (Confirmed Working)

1. Quit Claude Desktop completely
2. Delete VM bundle:

```bash
rm -rf ~/Library/Application\ Support/Claude/vm_bundles/

1. Restart Claude Desktop

This forces Claude to recreate the VM bundle, which resolves the issue.

Notes

• The user-facing error message is misleading (suggests macOS network issue)
• Likely an issue with VM image not being properly updated during app update

---

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.1.1520 (48ced7) 2026-01-30T03:29:40.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_