[BUG] Claude desktop app launches but shows no window on macOS 26

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?

Platform

• macOS: 26.4.1 (Build 25E253, Darwin 25.4.0)
• Claude.app: installed at /Applications/Claude.app

Problem
When launching the Claude desktop app, no window or UI appears.
The app process starts silently and never shows a window.

Observed behavior

• The main process and helper processes (GPU, Network) spawn successfully
• No renderer process is created
• No window appears
• No crash report is generated in ~/Library/Logs/DiagnosticReports/
• ~/Library/Application Support/Claude/ remains empty (no state written)
• AppleScript reports the app has no windows

Running processes after launch:
/Applications/Claude.app/Contents/MacOS/Claude
Claude Helper (gpu-process)
Claude Helper (network.mojom.NetworkService)
[no renderer process]

Steps to reproduce

1. Launch Claude.app on macOS 26.4.1
2. No window appears

Workarounds tried

• Force quit and relaunch
• Deleted ~/Library/Application Support/Claude/
• Reset window position with: defaults delete com.anthropic.claudefordesktop

NSWindow*

• Reinstalled the app
• Ran open -a Claude from Terminal

Expected behavior
The main chat window should appear on launch.

What Should Happen?

Claude Desktop should show UI on startup

Error Messages/Logs

Steps to Reproduce

1. Install Claude on macOS: 26.4.1 (Build 25E253, Darwin 25.4.0)
2. Open the app and see if UI window appears

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Claude Desktop

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_