filemon ☆

« Back to VersTracker

Description:
FSEvents client

Type: Cask | Latest Version: 2.0@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: filesystem monitoring fsevents macos developer-tools

Install: brew install --cask filemon

About:
Filemon is a real-time FSEvents monitoring tool for macOS that tracks filesystem activity at the kernel level. It provides detailed visibility into file creation, modification, and deletion events across the system. This utility is essential for developers debugging file I/O operations or monitoring system changes.

Key Features:

Real-time filesystem event monitoring
Detailed event filtering and logging
Low-level FSEvents API access
Command-line interface for automation

Use Cases:

Debugging application file I/O behavior
Monitoring system file changes for security analysis
Tracking installation or build process file modifications

Alternatives:

fswatch – fswatch provides cross-platform file monitoring with multiple backend options, while Filemon is macOS-specific and uses native FSEvents
fs_usage – fs_usage is a built-in macOS tool that shows system calls but lacks Filemon's focused FSEvents monitoring and filtering capabilities

Version History

Detected	Version	Rev	Change	Commit