Protection
Four Layers of Defense
Every file is analyzed through multiple detection engines, catching threats that single-method scanners miss.
Hash Matching
Compares file hashes against known malware databases for instant identification of recognized threats. SHA-256 checksums are matched against a bundled database of known malicious files, providing immediate detection of cataloged malware without any network requests.
YARA Rules
Pattern-based scanning using industry-standard YARA rules to detect malware families and variants. ShieldKit ships with a comprehensive ruleset that identifies malicious code patterns, suspicious strings, and known exploit signatures across binary and script files.
Behavioral Analysis
Examines file behavior patterns and suspicious characteristics without executing the file. Static analysis inspects entropy levels, embedded URLs, obfuscation techniques, and structural anomalies that indicate malicious intent — all without running the potentially dangerous code.
Code Signing Verification
Verifies Apple code signatures and notarization status to detect tampered or unsigned binaries. Every application and executable is checked against Apple's code signing infrastructure to ensure it hasn't been modified since the developer signed it.
And More
Beyond Detection
ShieldKit goes further with real-time protection and automated threat response.
Real-Time Monitoring
Watches your filesystem for new and modified files, scanning them automatically as they appear. ShieldKit uses macOS file system events to detect changes in real time, so new downloads and file modifications are analyzed the moment they happen.
URL Monitoring
Monitors your browser history for visits to known malicious websites. ShieldKit periodically checks Safari and Chrome history against a local threat database, alerting you if any dangerous URLs are detected so you can take action.
Quarantine System
Automatically isolates detected threats, preventing them from executing while you review the results. Quarantined files are moved to an isolated location where they cannot harm your system, giving you time to investigate and decide what action to take.
100% Offline. Zero Data Collection.
Every detection engine runs entirely on your Mac. No telemetry, no analytics, no crash reports. Your files never leave your machine. The only network activity is optional update checks via Sparkle.
Protect Your Mac Today
Free, offline, and built for privacy. Download ShieldKit and run your first scan in under a minute.
Download for macOS