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Mac Sai vs Maintenance: catalog facts
Mac Sai	Maintenance
Free Free and open source.	Free Free to use, with optional donations to the developer.
macOS	macOS
Cleaner, optimizer and malware scanner in one app Apple-notarized builds	Runs maintenance tasks without terminal commands Clears application, font and system caches
macOS only Young project from a single maintainer	macOS only You must download the version that matches your macOS release
Downloadable app	Downloadable app
Open source	Closed source
License not stated	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 October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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