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OnyX vs Mac Sai: catalog facts
OnyX	Mac Sai
Free Free to use; the developer accepts donations.	Free Free and open source.
macOS	macOS
Many maintenance tasks without typing Terminal commands Access to hidden settings in Finder, Dock and Safari	Cleaner, optimizer and malware scanner in one app Apple-notarized builds
Each version works only with one macOS release Latest version requires an Apple silicon Mac	macOS only Young project from a single maintainer
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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