Claude Computer Use Mac Lockdown Kit — Security Setup

Claude Computer Use gives AI control of your Mac — mouse, keyboard, screen. The Lockdown Kit makes that safe to leave on permanently, in 10 minutes flat. Built from 6 weeks of daily production use and the three security rules that survived every edge case.

What You Get

• Dedicated macOS User Account Setup Guide — Step-by-step instructions to create an isolated user account where Claude operates. Your main account files, passwords, and browser sessions stay completely separate.
• Browser Profile Isolation Checklist — Chrome and Safari profile configuration that limits what Claude can see to only the sites and tools you explicitly choose.
• Permission Scoping Templates — Exact Accessibility and Screen Recording permission configurations with revocation instructions and audit steps.
• Sensitive App Closing Checklist — Pre-session checklist covering banking, email, messaging, password managers, healthcare portals, and HR systems. Print it. Run it every time.
• Session Security Audit Script — A bash script that checks which apps have permissions, what is running, and flags anything sensitive before you start a session.
• The Three Rules — The non-negotiable security rules from the article: local files only, close sensitive apps, never schedule unsupervised sensitive tasks.

How to Use

1. Read the Three Rules document first — takes 2 minutes, frames everything else.
2. Run the session-security-audit.sh script to see your current exposure level.
3. Follow the dedicated macOS user account setup for maximum isolation.
4. Use the checklists before every Claude Computer Use session.
5. Re-run the audit script periodically to catch permission drift.

Who This Is For

• Mac users who want to use Claude Computer Use but worry about privacy and security
• Professionals handling client data, financial information, or sensitive documents
• Developers who want a production-grade security posture for AI automation
• Anyone who read the article and wants the exact setup described

Built by Anup Karanjkar, who has been running Claude Computer Use daily since launch. Browse more automation kits at /collections or explore 117 free developer tools.