macOS Security and Privacy Guide is a community-maintained reference for hardening and securing macOS systems on Apple silicon Macs.
The guide addresses the problem of securing personal macOS systems by providing a structured collection of security and privacy techniques. It works by presenting a threat model framework—defining assets, adversaries, and capabilities—followed by specific mitigations organized across system layers. The approach covers firmware configuration, full-disk encryption with FileVault, firewall setup including packet filtering, DNS hardening, browser privacy, encrypted communications, malware prevention through code signing and sandboxing, authentication mechanisms, backup strategies, and system monitoring through logs and network analysis.
The guide targets experienced users seeking enterprise-grade security practices, though it remains accessible to privacy-conscious novices. It suits individuals who want to apply organizational security standards to personal machines and those building threat models for their specific use cases. For organization-managed Macs, the guide references the macOS Security Compliance Project maintained by the U.S. National Institute of Standards and Technology as an alternative resource. The guide explicitly disclaims warranties and places responsibility for consequences on the user.
The project maintains active engagement with macOS security practices across multiple domains including firmware, encryption, network filtering, application sandboxing, and system monitoring. Documentation spans both foundational concepts and practical implementation details, with coverage of third-party tools like DNSCrypt, Privoxy, Tor, and Wireshark alongside native macOS security features. The guide addresses emerging security features such as Lockdown Mode while providing configuration examples for lower-level tools like packet filters and firewall rules.
