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
Mar 30, 2023 8:42am 1.2 0 VERSION_BUMP bde0bf57
Mar 1, 2023 6:12pm 1.2 0 VERSION_BUMP cc88acfd
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