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The Wire · Showcase

INTEL MACOS CODEX CRASHES ON V8 STARTUP, SIGNING FIX SHIPS

By RepoJournal · Filed · About OpenAI

Code Mode tool calls are crashing on Intel macOS because V8's code range allocation triggers Hardened Runtime rejection without the right entitlement.

OpenAI shipped an emergency fix [1] that adds the missing Intel V8 signing entitlement to Codex release binaries. The crash happens during the first tool call when V8 tries to make a non-JIT memory reservation executable, and the current signature only contains the JIT-specific entitlement. This is an immediate production issue for anyone running Codex on Intel Macs with the latest GPT-5.6 sol tool calls.

In parallel, the core team is standardizing how collaboration and sub-agent activity items flow through the system. Both the canonical collab tool call items [2] and the canonical sub-agent activity items [3] are now emitting through the proper TurnItem lifecycle instead of legacy events. App-server v2 consumes these canonical items directly, applies thread-watch cleanup from completed items, and ignores the mapped legacy events. This architectural consolidation reduces event complexity and tightens the contract between core and app-server.

A refactor extracted remote compaction request attempts [4] as a behavior-preserving change ahead of follow-up work on compaction fallbacks. The login system now supports hosted success redirects [5], letting app-server callers opt into a hosted page instead of localhost, while persisting credentials before the redirect.

Action items

References

  1. [1] fix(release): add missing Intel V8 signing entitlement (#30953) openai/codex
  2. [2] feat(core): emit canonical collab tool call items ↗ openai/codex
  3. [3] feat(core): emit canonical sub-agent activity items ↗ openai/codex
  4. [4] chore: extract remote compaction request attempts ↗ openai/codex
  5. [5] [login] support hosted success redirects ↗ openai/codex

FAQ

What changed in OpenAI on July 8, 2026?
Code Mode tool calls are crashing on Intel macOS because V8's code range allocation triggers Hardened Runtime rejection without the right entitlement.
What should OpenAI teams do about it?
Deploy the Intel V8 signing entitlement fix immediately if you support Codex on Intel macOS • Verify app-server v2 is consuming canonical TurnItem events and ignoring mapped legacy events • Monitor compaction behavior after the follow-up refactor lands
Which OpenAI repositories shipped on July 8, 2026?
openai/codex

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