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claude-code - 💡(How to fix) Fix illegal hardware instruction" on Intel Core i5-3470S (Ivy Bridge, no AVX2) - crashes on startup

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Error Message

Error Messages/Logs

claude --version también falla con el mismo error

Code Example

zsh: illegal hardware instruction  claude
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Claude Code version: latest via npm (@anthropic-ai/claude-code) OS: macOS CPU: Intel(R) Core(TM) i5-3470S CPU @ 2.90GHz (Ivy Bridge, 2012) Architecture: x86_64 AVX2 support: hw.optional.avx2_0: 0 (NO AVX2) Node.js: v22.22.3 Terminal: zsh iMac: Intel iMac (late 2012)

What Should Happen?

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.

Error Messages/Logs

zsh: illegal hardware instruction  claude

Steps to Reproduce

Comportamiento observado:

Primera instancia de Claude Code abierta ANTES de la actualización funcionaba Cualquier intento de abrir Claude Code después de reinstalar falla inmediatamente claude --version también falla con el mismo error El binario /usr/local/bin/claude apunta a claude.exe (Bun runtime) que requiere AVX2

Pasos para reproducir:

npm install -g @anthropic-ai/claude-code claude Crash inmediato con "illegal hardware instruction"

Issues relacionados:

#21018 #5864 #10408

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

zsh: illegal hardware instruction claude --version

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

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claude-code - 💡(How to fix) Fix illegal hardware instruction" on Intel Core i5-3470S (Ivy Bridge, no AVX2) - crashes on startup