[BUG] claude app crashes seconds after being opened

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?

App version: 1.9659.2
• macOS: 26.5 (25F71)
• Hardware: MacBook Pro, Mac14,7 (Apple M2)
• Crash: App crashes ~10–15 seconds after launch. Crash log shows OOM error in V8: Ineffective mark-compacts near heap limit / Allocation failed - JavaScript heap out of memory, climbing to ~2GB before a SIGTRAP.
• Persists after: clean reinstall (universal binary), full wipe of ~/Library/Application Support/Claude and caches, and launching natively via arch -arm64.

What Should Happen?

The app should launch and remain open normally, loading the chat interface without crashing. Instead, it crashes ~10–15 seconds after launch every time, with the V8 JavaScript heap growing to ~2GB before an out-of-memory crash (SIGTRAP). This happens from a completely clean state — fresh reinstall of the universal binary, full removal of ~/Library/Application Support/Claude and caches, and even when forced to run natively via arch -arm64. Browser version at claude.ai works fine, so the issue is specific to the desktop app on macOS 26.5.

Error Messages/Logs

Steps to Reproduce

1. Install Claude desktop v1.9659.2 (universal binary from claude.ai/download) on macOS 26.5 (25F71), MacBook Pro Mac14,7 (Apple M2).
2. Launch the app from Applications.
3. Wait ~10–15 seconds.
4. App crashes with a V8 out-of-memory error (OOM error in V8: Ineffective mark-compacts near heap limit / Allocation failed - JavaScript heap out of memory), SIGTRAP.

Crash persists after: full wipe of ~/Library/Application Support/Claude, ~/Library/Caches/Claude, and saved state; clean reinstall; and launching natively via arch -arm64.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.9659.2

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_