codex - 💡(How to fix) Fix Codex Computer Use fails on macOS 26.4.1 with code-signing invalid helper

Summary

Codex Computer Use does not work on macOS. @Computer always returns:

Computer Use permissions are not granted

This continues even after granting Accessibility and Screen & System Audio Recording permissions, resetting permissions, starting new Codex threads, turning VPN off, and reinstalling Codex.

Correlation ID

019e096c-21ea-7a83-b3fa-87204325ebe8

Environment

• macOS: 26.4.1 (25E253)
• Codex app: 26.506.31421
• Computer Use helper bundle ID: com.openai.sky.CUAService
• Helper version: 780
• Mac: Apple Silicon
• VPN: Surfshark disabled during test

Steps Tried

• Enabled Accessibility for Codex
• Enabled Accessibility for Codex Computer Use
• Enabled Screen & System Audio Recording for Codex-related entries
• Ran targeted permission resets:

tccutil reset ScreenCapture com.openai.codex
tccutil reset ScreenCapture com.openai.sky.CUAService

• Re-granted permissions after reset
• Tried brand-new Codex threads
• Turned Surfshark/VPN off
• Reinstalled Codex
• Moved/refreshed the local Computer Use helper/cache

Actual Behavior

Computer Use remains unavailable. @Computer still reports:

Computer Use permissions are not granted

Local Evidence

Running codesign verification on the helper reports:

codesign --verify --verbose=4 "$HOME/.codex/computer-use/Codex Computer Use.app"

returns:

invalid signature (code or signature have been modified)
In architecture: arm64

A crash report also showed:

SkyComputerUseClient
SIGKILL (Code Signature Invalid)
Termination: CODESIGNING / Launch Constraint Violation
Bundle ID: com.openai.sky.CUAService.cli

Expected Behavior

After granting Accessibility and Screen Recording permissions, Codex Computer Use should be able to inspect and operate apps such as Calculator.

Ask

Please advise whether this is a known Codex Computer Use helper signing/registration issue on macOS 26.4.1 and how to repair or replace the helper.