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OverSight vs BlockBlock: catalog facts
OverSight	BlockBlock
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free, with source code published on GitHub.
macOS	macOS
Makes supported capture-device access visible to the user.	Real-time alerts for new launch items and other persistence Built on Apple's Endpoint Security Framework
It monitors access rather than deciding whether a recording is appropriate.	macOS only, version 10.15 or later Requires Full Disk Access and admin authorization
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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