[BUG] Claude Desktop 1.2278.0 crashes on launch - macOS Tahoe 26.4.1 / Apple M5 (Mac17,2)

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: 1.2278.0
macOS: 26.4.1 (25E253)
Hardware: MacBook Pro Mac17,2 (Apple M5, ARM-64)
Electron Framework: 41.2.0

What happens:
App crashes immediately on launch with EXC_BREAKPOINT (SIGTRAP).
Crash occurs in main thread during V8/Electron initialization,
before UI loads.

Crash type: EXC_BREAKPOINT / Trace/BPT trap: 5
Faulting thread: com.apple.main-thread
Stack: ares_dns_rr_get_ttl → v8::Isolate::Dispose() → ElectronMain → start

Related issues: #29625, #47644

What Should Happen?

Claude Desktop should launch and reach the main chat UI without crashing.
The app should be stable on macOS Tahoe 26.4.1 running on Apple M5 hardware (Mac17,2).

Error Messages/Logs

Steps to Reproduce

1. Download Claude Desktop 1.2278.0 from claude.ai/download
2. Install on macOS Tahoe 26.4.1 (25E253) on Apple M5 (Mac17,2)
3. Launch the app
4. App crashes immediately before reaching the UI

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.2278.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_