[BUG] Claude Desktop crashes ~40 seconds after login on macOS Tahoe 26.4.1 - EXC_BREAKPOINT in V8/Electron (v1.3109.0)

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?

Claude Desktop crashes every time after login with no warning or error message. The app fully quits and disappears from the Dock completely.

Crash behavior:

• In regular Claude mode: app stays open
• In Code or Cowork mode: crashes 10 seconds upon clicking either tab
• Consistent error messages, was able to replicate some sort of information on the electron issue
• Reproduced 20+ times consistently

This worked perfectly on this Mac previously. The issue started with a recent update — the app has not successfully stayed open since.

Exception from crash log: EXC_BREAKPOINT (SIGTRAP) in V8/Electron (v8::TryCatch::Reset)

What Should Happen?

Claude Desktop should remain open and functional after login without crashing. Code and Cowork tabs should load normally.

Error Messages/Logs

"exception" : {"codes":"0x0000000000000001, 0x000000011af987c4",
"rawCodes":[1,4747528132],
"type":"EXC_BREAKPOINT",
"signal":"SIGTRAP"}

"termination" : {"flags":0,"code":5,"namespace":"SIGNAL",
"indicator":"Trace/BPT trap: 5","byProc":"exc handler","byPid":33398}

"os_fault" : {"process":"Claude Helper"}

And the stack trace showed:

v8::TryCatch::Reset()
v8::TryCatch::Reset()
v8::CpuProfile::GetSamplesCount()
v8::Context::FromSnapshot()
ElectronMain
start

Steps to Reproduce

1. Install Claude Desktop 1.3109.0 on macOS Tahoe 26.4.1
2. Launch the app
3. Sign in with Google account
4. Wait ~40 seconds — app crashes silently with no warning
5. OR: click Code or Cowork tab immediately after login — crashes instantly

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

1.260402.0

Claude Code Version

1.3109.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

What I've tried:

• Clean reinstall (deleted app, cleared all caches and app support files, redownloaded)
• Cleared ~/Library/Application Support/Claude entirely
• Cleared ~/Library/Caches/Claude
• Launched with --disable-gpu flag
• All attempts failed, crash persists

Related locked issue: #29625 (same EXC_BREAKPOINT crash, marked invalid, but bug persists on latest build)