[BUG] ( Cowork )[BUG] Cowork - Claude Code process exited with code 132 on Apple Silicon 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?

Cowork crashes immediately on every attempt with the following error:

"Something went wrong. Claude Code process exited with code 132.
You can restart the conversation from a previous message."

Exit code 132 = SIGILL (Illegal Instruction), which suggests a binary
compatibility issue between the Claude Code process and Apple Silicon
when spawned internally by the Desktop app.

Steps to reproduce

1. Open Claude Desktop on Apple Silicon Mac
2. Navigate to Cowork
3. Start or attempt any conversation
4. Error appears immediately, no response is generated

What I tried

• Deleted the local-agent-mode-sessions folder from

~/Library/Application Support/Claude/

• Deleted the Session Storage folder from the same directory
• Restarted the app
• After cleanup, error code changed from 1 to 132,

confirming the session folders were corrupted/conflicting

What Should Happen?

Cowork should load and respond normally.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Desktop on Apple Silicon Mac
2. Navigate to Cowork
3. Start or attempt any conversation
4. Error appears immediately, no response is generated

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.1617.0 (8d6345) 2026-04-09T16:10:15.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

This appears related to issues #39270 and #46161 reported by other users
on Apple Silicon. The exit code 132 (SIGILL) is more specific than the
generic code 1 and may help narrow down the root cause.