[BUG] Installer installing wrong architecture on MacOS

Preflight Checklist

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

What's Wrong?

When I install on my M3 Max Macbook Pro it gives me an x86 executable, and then Claude sometimes runs into linker issues because it's looking for x86 libraries I don't have.

What Should Happen?

I should get the native Arm executable

Error Messages/Logs

ally@MacBag oddsbag %   curl -fsSL https://claude.ai/install.sh | sh

Setting up Claude Code...

✔ Claude Code successfully installed!

  Version: 2.1.63

  Location: ~/.local/bin/claude


  Next: Run claude --help to get started

⚠ Setup notes:
  • Native installation exists but ~/.local/bin is not in your PATH. Run:

  echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.zshrc && source ~/.zshrc


✅ Installation complete!

ally@MacBag oddsbag % file ~/.local/bin/claude
/Users/ally/.local/bin/claude: Mach-O 64-bit executable x86_64
ally@MacBag oddsbag % uname -m
arm64

Steps to Reproduce

curl -fsSL https://claude.ai/install.sh | sh on a Macbook Pro

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.63

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

I'm using Alacritty