[BUG]

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?

Cowork spaces no longer appear after updating to macOS 26.5 (25F71). The tab/spaces were visible before the update.

What Should Happen?

Cowork spaces should appear and function normally, as they did before the macOS 26.5 update.

Error Messages/Logs

Steps to Reproduce

Update macOS to 26.5 (25F71)
Open Claude Desktop
Cowork spaces no longer visible

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.9659.2 (390d6c)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Environment Info

Platform: macOS 26.5 (25F71)
Claude Desktop version: 1.9659.2 (390d6c)
Mac chip: Apple Silicon (M1)

Expected vs Actual

Expected: Cowork spaces visible as before
Actual: Spaces no longer displayed

Relevant context

Related to #23830 (macOS 26.x / vsock timeout issue)