Trace/BPT trap (SIGTRAP) in v8::base::OS::SetPermissions on Intel macOS — x86_64 binary is missing the allow-unsigned-executable-memory entitlement

[DerSchiman]

What version of Codex CLI is running?

codex-cli 0.139.0 (also reproduced on 0.138.0)

What subscription do you have?

ChatGPT Plus

Which model were you using?

gpt-5.5

What platform is your computer?

Darwin 24.6.0 x86_64 i386 (macOS 15.7.7 / 24G720, Intel Core i7-8700B, Mac mini 2018)

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

iTerm2 3.6.11, no multiplexer

Codex doctor report

codex doctor --json (username redacted, otherwise unmodified)

{
  "schemaVersion": 1,
  "generatedAt": "1781077584s since unix epoch",
  "overallStatus": "warning",
  "codexVersion": "0.139.0",
  "checks": {
    "app_server.status": {
      "id": "app_server.status",
      "category": "app-server",
      "status": "ok",
      "summary": "background server is not running",
      "details": {
        "control socket": "/Users/REDACTED/.codex/app-server-control/app-server-control.sock",
        "daemon state dir": "/Users/REDACTED/.codex/app-server-daemon",
        "mode": "ephemeral",
        "pid file": "/Users/REDACTED/.codex/app-server-daemon/app-server.pid (missing)",
        "settings": "/Users/REDACTED/.codex/app-server-daemon/settings.json (missing)",
        "status": "not running",
        "update-loop pid file": "/Users/REDACTED/.codex/app-server-daemon/app-server-updater.pid (missing)"
      },
      "remediation": null,
      "durationMs": 0
    },
    "auth.credentials": {
      "id": "auth.credentials",
      "category": "auth",
      "status": "ok",
      "summary": "auth is configured",
      "details": {
        "auth file": "/Users/REDACTED/.codex/auth.json",
        "auth storage mode": "File",
        "stored API key": "false",
        "stored ChatGPT tokens": "true",
        "stored agent identity": "false",
        "stored auth mode": "chatgpt"
      },
      "remediation": null,
      "durationMs": 0
    },
    "config.load": {
      "id": "config.load",
      "category": "config",
      "status": "ok",
      "summary": "config loaded",
      "details": {
        "CODEX_HOME": "/Users/REDACTED/.codex",
        "config.toml": "/Users/REDACTED/.codex/config.toml",
        "config.toml parse": "ok",
        "cwd": "/Users/REDACTED",
        "enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_suggest, plugins, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies",
        "feature flag overrides": "none",
        "feature flags enabled": "27",
        "log dir": "/Users/REDACTED/.codex/log",
        "mcp servers": "4",
        "model": "gpt-5.5",
        "model provider": "openai",
        "sqlite home": "/Users/REDACTED/.codex"
      },
      "remediation": null,
      "durationMs": 0
    },
    "git.environment": {
      "id": "git.environment",
      "category": "git",
      "status": "ok",
      "summary": "git version 2.54.0",
      "details": {
        "PATH git #1": "/usr/local/bin/git",
        "PATH git #2": "/usr/bin/git",
        "PATH git entries": "2",
        "git build options": "git version 2.54.0; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh; rust: disabled; feature: fsmonitor--daemon; gettext: enabled; libcurl: 8.6.0; zlib: 1.2.12; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1",
        "git exec path": "/usr/local/opt/git/libexec/git-core",
        "git version": "git version 2.54.0",
        "repo detected": "false",
        "selected git": "/usr/local/bin/git"
      },
      "remediation": null,
      "durationMs": 31
    },
    "installation": {
      "id": "installation",
      "category": "install",
      "status": "ok",
      "summary": "installation looks consistent",
      "details": {
        "PATH codex #1": "/Users/REDACTED/.local/bin/codex",
        "PATH codex #2": "/usr/local/bin/codex",
        "PATH codex entries": "2",
        "current executable": "/Users/REDACTED/.local/bin/codex",
        "install context": "standalone (unix, package /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin, bin /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/bin, resources /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/codex-resources, path /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/codex-path)",
        "managed by bun": "false",
        "managed by npm": "false",
        "managed package root": "not set"
      },
      "remediation": null,
      "durationMs": 6
    },
    "mcp.config": {
      "id": "mcp.config",
      "category": "mcp",
      "status": "ok",
      "summary": "MCP configuration is locally consistent",
      "details": {
        "configured servers": "4",
        "disabled servers": "0",
        "stdio servers": "4"
      },
      "remediation": null,
      "durationMs": 1
    },
    "network.env": {
      "id": "network.env",
      "category": "network",
      "status": "ok",
      "summary": "network-related environment looks readable",
      "details": {
        "proxy env vars": "none"
      },
      "remediation": null,
      "durationMs": 0
    },
    "network.provider_reachability": {
      "id": "network.provider_reachability",
      "category": "reachability",
      "status": "ok",
      "summary": "active provider endpoints are reachable over HTTP",
      "details": {
        "ChatGPT base URL": "https://chatgpt.com/backend-api/ reachable (HTTP 404)",
        "reachability mode": "ChatGPT auth"
      },
      "remediation": null,
      "durationMs": 498
    },
    "network.websocket_reachability": {
      "id": "network.websocket_reachability",
      "category": "websocket",
      "status": "ok",
      "summary": "Responses WebSocket handshake succeeded",
      "details": {
        "DNS": "2 IPv4, 2 IPv6, first IPv4",
        "auth mode": "chatgpt",
        "connect timeout": "15000 ms",
        "endpoint": "wss://chatgpt.com/backend-api/<redacted>",
        "handshake result": "HTTP 101 Switching Protocols",
        "model provider": "openai",
        "models etag present": "true",
        "provider name": "OpenAI",
        "proxy env vars": "none",
        "reasoning header": "false",
        "server model present": "false",
        "supports websockets": "true",
        "wire API": "responses"
      },
      "remediation": null,
      "durationMs": 1641
    },
    "runtime.provenance": {
      "id": "runtime.provenance",
      "category": "runtime",
      "status": "ok",
      "summary": "running standalone on macos-x86_64",
      "details": {
        "commit": "unknown",
        "current executable": "/Users/REDACTED/.local/bin/codex",
        "install method": "standalone (unix, package /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin, bin /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/bin, resources /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/codex-resources, path /Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/codex-path)",
        "platform": "macos-x86_64",
        "version": "0.139.0"
      },
      "remediation": null,
      "durationMs": 0
    },
    "runtime.search": {
      "id": "runtime.search",
      "category": "search",
      "status": "ok",
      "summary": "search is OK (bundled)",
      "details": {
        "search command": "/Users/REDACTED/.codex/packages/standalone/releases/0.139.0-x86_64-apple-darwin/codex-path/rg",
        "search command readiness": "file exists",
        "search provider": "bundled"
      },
      "remediation": null,
      "durationMs": 0
    },
    "sandbox.helpers": {
      "id": "sandbox.helpers",
      "category": "sandbox",
      "status": "ok",
      "summary": "sandbox configuration is readable",
      "details": {
        "approval policy": "OnRequest",
        "codex-linux-sandbox helper": "none",
        "execve wrapper helper": "/Users/REDACTED/.codex/tmp/arg0/codex-arg0oVM7vy/codex-execve-wrapper",
        "filesystem sandbox": "restricted",
        "network sandbox": "restricted"
      },
      "remediation": null,
      "durationMs": 0
    },
    "state.paths": {
      "id": "state.paths",
      "category": "state",
      "status": "ok",
      "summary": "state paths and databases are inspectable",
      "details": {
        "CODEX_HOME": "/Users/REDACTED/.codex (dir)",
        "active rollout files": "171 files, 87245212 total bytes, 510205 average bytes",
        "archived rollout files": "1 files, 72014 total bytes, 72014 average bytes",
        "goals DB": "/Users/REDACTED/.codex/goals_1.sqlite (file)",
        "goals DB integrity": "ok",
        "log DB": "/Users/REDACTED/.codex/logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "/Users/REDACTED/.codex/log (dir)",
        "memories DB": "/Users/REDACTED/.codex/memories_1.sqlite (file)",
        "memories DB integrity": "ok",
        "sqlite home": "/Users/REDACTED/.codex (dir)",
        "standalone release cache": "1 entries in /Users/REDACTED/.codex/packages/standalone/releases",
        "state DB": "/Users/REDACTED/.codex/state_5.sqlite (file)",
        "state DB integrity": "ok"
      },
      "remediation": null,
      "durationMs": 692
    },
    "state.rollout_db_parity": {
      "id": "state.rollout_db_parity",
      "category": "threads",
      "status": "warning",
      "summary": "rollout files and state DB thread inventory differ",
      "details": {
        "default model provider": "openai",
        "rollout DB active files": "171",
        "rollout DB active rows": "168",
        "rollout DB archive mismatches": "0",
        "rollout DB archived files": "1",
        "rollout DB archived rows": "1",
        "rollout DB duplicate DB paths": "0",
        "rollout DB duplicate rollout thread ids": "0",
        "rollout DB malformed file names": "0",
        "rollout DB missing active rows": "3",
        "rollout DB missing active sample": [
          "/Users/REDACTED/.codex/sessions/2026/04/11/rollout-2026-04-11T16-38-32-019d7cfa-eac3-71d3-b151-6d5df36e820c.jsonl",
          "/Users/REDACTED/.codex/sessions/2026/04/11/rollout-2026-04-11T16-25-08-019d7cee-a92c-7e02-9507-d8b2604058e3.jsonl",
          "/Users/REDACTED/.codex/sessions/2026/04/11/rollout-2026-04-11T16-06-40-019d7cdd-bfc0-73c1-9be7-9720aeaf230a.jsonl"
        ],
        "rollout DB missing archived rows": "0",
        "rollout DB model providers": "openai=169",
        "rollout DB rows": "169",
        "rollout DB scan cap reached": "false",
        "rollout DB scan errors": "0",
        "rollout DB sources": "subagent:thread_spawn=66, cli=49, subagent:other=28, vscode=25, exec=1",
        "rollout DB stale rows": "0"
      },
      "issues": [
        {
          "severity": "warning",
          "cause": "rollout files are missing from the state DB",
          "measured": "3 active, 0 archived",
          "expected": "every rollout file has a matching threads row",
          "remedy": null,
          "fields": []
        }
      ],
      "remediation": null,
      "durationMs": 1194
    },
    "system.environment": {
      "id": "system.environment",
      "category": "system",
      "status": "ok",
      "summary": "OS language en-DE",
      "details": {
        "EDITOR": "not set",
        "LANG": "de_DE.UTF-8",
        "LESS": "set",
        "PAGER": "set",
        "VISUAL": "not set",
        "os": "Mac OS 15.7.7 [64-bit]",
        "os language": "en-DE",
        "os type": "Mac OS",
        "os version": "15.7.7"
      },
      "remediation": null,
      "durationMs": 7
    },
    "terminal.env": {
      "id": "terminal.env",
      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "COLORFGBG": "15;0",
        "COLORTERM": "truecolor",
        "TERMINFO_DIRS entry": [
          "/Applications/iTerm.app/Contents/Resources/terminfo (dir)",
          "/usr/share/terminfo (dir)"
        ],
        "TERM_PROGRAM": "iTerm.app",
        "color output": "disabled (stdout is not a terminal)",
        "effective locale": "de_DE.UTF-8",
        "stderr is terminal": "false",
        "stdin is terminal": "false",
        "stdout is terminal": "false",
        "terminal": "iTerm2",
        "terminal size": "80x24",
        "terminal version": "3.6.11"
      },
      "remediation": null,
      "durationMs": 11
    },
    "terminal.title": {
      "id": "terminal.title",
      "category": "title",
      "status": "ok",
      "summary": "terminal title default",
      "details": {
        "terminal title activity": "true",
        "terminal title items": "activity, project-name",
        "terminal title project source": "cwd",
        "terminal title project value": "REDACTED",
        "terminal title source": "default"
      },
      "remediation": null,
      "durationMs": 1
    },
    "updates.status": {
      "id": "updates.status",
      "category": "updates",
      "status": "ok",
      "summary": "update configuration is locally consistent",
      "details": {
        "cached latest version": "0.139.0",
        "check for update on startup": "true",
        "dismissed version": "0.139.0",
        "last checked at": "2026-06-09T23:21:25.044160Z",
        "latest version": "0.139.0",
        "latest version status": "current version is not older",
        "update action": "standalone installer",
        "version cache": "/Users/REDACTED/.codex/version.json"
      },
      "remediation": null,
      "durationMs": 128
    }
  }
}

Closed as duplicate of #27358 — same crash, same workaround. I posted my additional findings (valid entitlements blob, isolated repro of the entitlement behavior) over there.

What happened?

On my Intel Mac mini, Codex sessions kept closing on me without warning: the TUI vanished mid-task and zsh printed trace trap codex. It happened three sessions in a row within an hour, and every single time it was at the moment the agent deployed a subagent or started running commands through unified_exec — sessions that never reached that point ran fine. Each crash left a report in ~/Library/Logs/DiagnosticReports/.

All 8 crash reports I collected have the identical faulting stack — V8 isolate creation aborting in OS::SetPermissions:

Redacted crash report excerpt

Incident:    2026-06-10 01:44:16.00 +0200
Process:     /usr/local/lib/node_modules/@openai/codex/node_modules/@openai/codex-darwin-x64/vendor/x86_64-apple-darwin/bin/codex
OS:          macOS 15.7.7 (24G720)
CPU:         X86-64
Exception:   EXC_BREAKPOINT (SIGTRAP), codes: 0x0000000000000002, 0x0000000000000000
Termination: Trace/BPT trap: 5

Faulting thread:
 0  codex   v8::base::OS::SetPermissions(void*, unsigned long, v8::base::OS::MemoryPermission) + 231
 1  codex   v8::internal::CodeRange::InitReservation(v8::PageAllocator*, unsigned long, bool) + 587
 2  codex   v8::internal::Heap::SetUp(v8::internal::LocalHeap*) + 399
 3  codex   v8::internal::Isolate::Init(v8::internal::SnapshotData*, ...) + 1967
 4  codex   v8::internal::Isolate::InitWithSnapshot(...) + 9
 5  codex   v8::internal::Snapshot::Initialize(v8::internal::Isolate*) + 539
 6  codex   v8::Isolate::Initialize(v8::Isolate*, v8::Isolate::CreateParams const&) + 603
 7  codex   v8::Isolate::New(v8::Isolate::CreateParams const&) + 55
 8  codex   v8::isolate::Isolate::new::hd4b09eb7264c03d7 + 103
 9  codex   <unsymbolicated>
10  codex   std::sys::backtrace::__rust_begin_short_backtrace + 64

First I suspected a 0.139.0 regression and downgraded to 0.138.0 — same crash, same stack. It also doesn't matter how Codex is installed: I reproduced it with the npm package, the Homebrew cask and the standalone installer. Sessions that never touch unified_exec run fine, which fits: the V8 isolate is only created when that code path is hit.

Root cause

The x86_64-apple-darwin binaries are signed with the hardened runtime but only carry the com.apple.security.cs.allow-jit entitlement:

$ codesign -dvv codex-x86_64-apple-darwin
CodeDirectory v=20500 ... flags=0x10000(runtime)
Authority=Developer ID Application: OpenAI OpCo, LLC (2DC432GLL2)

$ codesign -d --entitlements - codex-x86_64-apple-darwin
[Key] com.apple.security.cs.allow-jit
[Value] [Bool] true

allow-jit only covers MAP_JIT mappings. On Intel, V8's code range setup uses plain RWX mmap/mprotect without MAP_JIT, and under the hardened runtime that additionally requires com.apple.security.cs.allow-unsigned-executable-memory. Without it the call fails with EPERM, V8 hits a CHECK and aborts via SIGTRAP — exactly the OS::SetPermissions frame at the top of every crash. On Apple Silicon V8 goes through MAP_JIT + per-thread write protection, so allow-jit alone is enough there. I assume that's why this never showed up in your release testing.

I verified the mechanism in isolation with a small test program signed the same way the shipped binary is:

#include <sys/mman.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main(){
  void *p = mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0);
  printf("plain RWX mmap:   %s (%s)\n", p==MAP_FAILED?"FAILED":"ok", p==MAP_FAILED?strerror(errno):"-");
  void *q = mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON|MAP_JIT, -1, 0);
  printf("MAP_JIT RWX mmap: %s (%s)\n", q==MAP_FAILED?"FAILED":"ok", q==MAP_FAILED?strerror(errno):"-");
  void *r = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
  int rc = mprotect(r, 4096, PROT_READ|PROT_EXEC|PROT_WRITE);
  printf("mprotect RW->RWX: %s (%s)\n", rc?"FAILED":"ok", rc?strerror(errno):"-");
  return 0;
}

Signed with hardened runtime + allow-jit only (like codex):

plain RWX mmap:   FAILED (Permission denied)
MAP_JIT RWX mmap: ok (-)
mprotect RW->RWX: FAILED (Permission denied)

Signed with hardened runtime + allow-jit + allow-unsigned-executable-memory:

plain RWX mmap:   ok (-)
MAP_JIT RWX mmap: ok (-)
mprotect RW->RWX: ok (-)

Workaround (verified working)

Re-sign the binary locally, keeping the hardened runtime and adding the missing entitlement:

cat > /tmp/codex-ent.plist <<'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0"><dict>
<key>com.apple.security.cs.allow-jit</key><true/>
<key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/>
</dict></plist>
EOF
cp "$(readlink -f "$(which codex)")" codex.bak
codesign -f -s - --options runtime --entitlements /tmp/codex-ent.plist "$(readlink -f "$(which codex)")"

After re-signing, sessions that spawn subagents and nested sub-shells run without any crash. Drawbacks of the workaround: the Developer ID signature is replaced by an ad-hoc one, and codex update restores the broken signature, so it has to be repeated after every update.

Suggested fix

Add com.apple.security.cs.allow-unsigned-executable-memory to the entitlements used when signing the x86_64-apple-darwin release binaries. Chromium and Deno ship the same entitlement on Intel macOS for exactly this reason.

What were you expecting to happen?

Sessions using unified_exec / subagents complete normally on Intel Macs, like they do on Apple Silicon.

Steps to reproduce

1. Intel Mac (tested on an i7-8700B Mac mini 2018, macOS 15.7.7), codex 0.138.0 or 0.139.0, any install method.
2. Start a session and give the agent a task that makes it run shell commands through unified_exec or spawn a subagent.
3. The process aborts with Trace/BPT trap: 5 as soon as the V8 isolate is created.

Full .ips crash reports are available if needed.

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• macOS 15.7.7: Code Mode crashes with SIGTRAP in V8 SetPermissions when entitlements are ignored #27358

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[DerSchiman]

Duplicate of #27358 — same stack and workaround. Posted my additional findings there.