vm_bundles grows to 9.3GB+ on initial download after v1.15962.0 update (June 25 2026) — freezes Intel Mac on Cowork open

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?

After updating to v1.15962.0 (June 25 2026), the vm_bundles folder
grows to 9.3GB+ on the initial VM download before any Cowork session
is started. This immediately freezes Claude Desktop on an Intel Mac
with 16GB RAM. The app becomes completely unresponsive and requires
a force quit.

This worked fine on the same machine with previous versions.

Claude Desktop version: 1.15962.0 (039543) 2026-06-25
OS: macOS
Chip: Intel UHD
RAM: 16GB
Related issue: #32263 (locked)

What Should Happen?

vm_bundles should not grow beyond a reasonable size on initial download.
Cowork should open and be usable on an Intel Mac with 16GB RAM as it
was in previous versions.

Error Messages/Logs

Steps to Reproduce

1. Delete vm_bundles folder:

rm -rf ~/Library/Application Support/Claude/vm_bundles

1. Open Claude Desktop
2. Click on Cowork tab
3. vm_bundles immediately starts growing — reaches 9.3GB+ within minutes
4. Claude Desktop freezes and becomes unresponsive

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.15962.0 (039543) 2026-06-25T01:24:19.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_