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FSMonitor vs FileMonitor: catalog facts
FSMonitor	FileMonitor
Paid Paid app with a free 14-day trial.	Free Free download from Objective-See.
macOS, Command line	macOS, Command line
Captures creations, deletions, renames and attribute changes Filtering by path, event type or process	Shows which process touched which file Useful for malware analysis and troubleshooting
macOS only Paid after the trial	Command line only, with no graphical interface macOS only
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.