[BUG] Claude on MacOS does not use default browser for logging in

Preflight Checklist

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

What's Wrong?

The MacOS desktop app always opens Safari when trying to login with SSO. I do not use Safari, and do not have my passwords stored in it -- and I don't want to sign in to Google in that browser.

What Should Happen?

Just like the CLI and VS Code extension, the Claude app should use the default browser on the system, rather than forcing the use of Safari.

Error Messages/Logs

Steps to Reproduce

1. Download the Claude app
2. Click "Sign in with Google"
3. Observe that Safari opens, rather than the default browser

Claude Model

None

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

1.9659.2

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

No response