macOS Security Hardening

Skill by ara.so — Security Skills collection.

This skill provides comprehensive guidance for securing macOS systems based on the community-maintained drduh/macOS-Security-and-Privacy-Guide. It covers system hardening, encryption, firewall configuration, DNS security, and privacy enhancements for both Apple silicon and Intel Macs.

Overview

The macOS Security and Privacy Guide is a collection of battle-tested techniques for:

• Full disk encryption with FileVault
• Firewall configuration (application-level and packet filtering)
• DNS security with DNSCrypt and encrypted DNS profiles
• Privacy hardening by disabling telemetry and tracking
• Secure browsing configurations for Firefox, Chrome, and Safari
• System monitoring with OpenBSM and DTrace
• Physical security measures and admin account separation

Important: Apple silicon Macs are strongly recommended over Intel Macs due to hardware-level security vulnerabilities in Intel CPUs that cannot be patched.