macOS][26.908.40834] Codex Desktop consistently hangs on the second prompt while CLI works normally

What version of Codex CLI is running?

codex-cli 0.154.0-alpha.6.2

What subscription do you have?

Pro

Which model were you using?

No response

What platform is your computer?

MacOS 27

What terminal emulator and version are you using (if applicable)?

No response

Codex doctor report

### What version of the Codex App are you using?

Codex Desktop: 26.908.40834
Codex CLI: 0.154.0-alpha.6.2

### Subscription

ChatGPT Pro

### Platform

Apple Silicon iMac M1
macOS 27.0

### Issue

Codex Desktop consistently works for the first prompt in a new conversation, but the second prompt hangs indefinitely.

This is reproducible in new conversations.

The first prompt completes normally.
The second prompt remains stuck and never produces a response.

Codex CLI works correctly on the same machine, using the same ChatGPT account.

### Steps to reproduce

1. Launch Codex Desktop.
2. Start a new conversation.
3. Send:
   "Responde apenas: PRIMEIRO OK"
4. The first response completes successfully.
5. Send:
   "Responde apenas: SEGUNDO OK"
6. The second turn hangs indefinitely.

This behavior reproduces repeatedly.

### Expected behavior

The second and subsequent prompts should execute normally.

### Actual behavior

The first turn succeeds, but the second turn hangs indefinitely.

### CLI verification

The bundled CLI works correctly:

codex-cli 0.154.0-alpha.6.2

Authentication:

Logged in using ChatGPT

Direct CLI execution succeeds:

/Applications/Codex.app/Contents/Resources/codex exec --skip-git-repo-check "Responde apenas: CODEX OK"

Result:

model: gpt-5.6-sol
provider: openai
approval: never
sandbox: danger-full-access
reasoning effort: medium

CODEX OK

Therefore the account, authentication, backend connection, and Codex execution engine appear to be working normally.

### Troubleshooting already performed

- Upgraded macOS to macOS 27.
- Fully quit and restarted Codex.
- Removed forced model configuration from ~/.codex/config.toml.
- Removed:
  model = "gpt-6-astra"
  model_reasoning_effort = "high"
  service_tier = "priority"
- Recreated the Codex Desktop application state by renaming:
  ~/Library/Application Support/Codex
- Reset macOS preferences:
  ~/Library/Preferences/com.openai.codex.plist
- Restarted cfprefsd.
- Confirmed no queue_1.sqlite / queue*.sqlite files exist.
- Verified authentication through Codex CLI.
- Verified direct CLI prompts work correctly.

None of these steps fixed the Desktop behavior.

### Logs

During the hang there is no obvious application crash or network failure.

The macOS unified log repeatedly shows preference lookups such as:

found no value for key <private> in CFPrefsSearchListSource
Domain: com.openai.codex

These messages repeat while the second prompt remains stuck.

There are also some securityd / Keychain messages, including:

Error Domain=NSOSStatusErrorDomain Code=-50
"no object for key query"

However, Codex CLI continues to work normally.

### Additional observation

The issue appears isolated to the Codex Desktop session/thread continuation layer rather than to the model backend, authentication, or network connection.

A fresh Desktop state still reproduces the issue:
first turn succeeds -> second turn hangs.

### Reproducibility

100% on my machine.

What issue are you seeing?

The issue is reproducible in new conversations:

• First prompt completes normally.
• Second prompt gets stuck and never returns a response.
• Codex CLI works correctly on the same Mac and same ChatGPT account.
• Authentication is valid.
• Recreating the Codex Desktop application state and resetting com.openai.codex preferences did not fix it.
  So the issue appears isolated to Codex Desktop conversation/session continuation, not the backend, account, or CLI.

What steps can reproduce the bug?

1. Open Codex Desktop on macOS.
2. Start a new conversation.
3. Send a first prompt, for example:
   Reply only: FIRST OK
4. Wait for the first response to complete successfully.
5. Send a second prompt in the same conversation:
   Reply only: SECOND OK
6. The second prompt hangs indefinitely and never returns a response.
7. Repeat in another new conversation: the same pattern occurs again.
   For comparison, running the bundled Codex CLI on the same Mac and same ChatGPT account works normally.

What is the expected behavior?

No response

Additional information

No response

Start by reproducing the second-turn hang in Codex Desktop, then compare it with the bundled /Applications/Codex.app/Contents/Resources/codex exec entry point, which works normally. Check whether resetting ~/Library/Application Support/Codex and com.openai.codex.plist changes the session behavior. Done means the second and later prompts complete reliably in new Desktop conversations on macOS.