[BUG] Claude Desktop (macOS): Cowork and Claude Code tabs disappeared after working previously

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?

The Cowork and Claude Code tabs were present and usable in the Claude Desktop app, but they suddenly disappeared. I’m on macOS 14.3.1 (Apple Silicon) and Claude Desktop version 1.3036.0. I already tried updating, quitting and relaunching, signing out and back in, and reinstalling, with no change.

This is a Claude Pro subscription.

What Should Happen?

Cowork and Code tabs should appear as the top menu

Error Messages/Logs

Steps to Reproduce

Steps to reproduce: Open Claude Desktop on macOS 14.3.1 (Apple Silicon) and look for the Cowork and Claude Code tabs in the left sidebar (they are missing).

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.3036.0 (desktop app)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="590" height="447" alt="Image" src="https://github.com/user-attachments/assets/46d7eca8-446f-4655-9b77-3f65889d55a6" />