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Mac Sai vs MacSift: catalog facts
Mac Sai	MacSift
Free Free and open source.	Free Free and open source.
macOS	macOS
Cleaner, optimizer and malware scanner in one app Apple-notarized builds	Groups cleanup candidates by app or device Moves selected items to Trash for recovery
macOS only Young project from a single maintainer	Requires macOS 26 Tahoe and Apple Silicon Needs Full Disk Access
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is 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 8, 2026

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