shield ☆

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Description:
App to protect against process injection

Type: Cask | Latest Version: 1.2@0 | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: security macos process-injection protection defense

Install: brew install --cask shield

About:
Shield is a macOS security utility designed to protect against unauthorized process injection techniques like DYLD_INSERT_LIBRARIES and LD_PRELOAD. It achieves this by modifying the dynamic linker environment variables to prevent third-party code from being loaded into protected processes. This tool provides an additional layer of defense against malware and debugging attempts targeting sensitive applications.

Key Features:

Blocks DYLD_INSERT_LIBRARIES and DYLD_FORCE_FLAT_NAMESPACE injection
Protects specific processes or all applications via configuration
Uses environment variable modification for lightweight protection
Open source and available via Homebrew
Command-line interface for easy integration

Use Cases:

Protecting sensitive applications from process injection attacks
Preventing unauthorized debugging or instrumentation of processes
Enhancing macOS security posture against DYLIB-based malware

Alternatives:

Little Snitch – Network-focused firewall, not specifically designed for process injection protection
Santa – Binary whitelisting/blacklisting system with broader security scope

Version History

Detected	Version	Rev	Change	Commit