Mac Sai

The open-source Mac cleaner, optimizer, and malware scanner. A free, Apple-notarized alternative to CleanMyMac, built with Swift 6 and SwiftUI.

Why Mac Sai?

A full-featured Mac cleaner should not cost a yearly subscription or ask you to trust a black box with deep access to your files. Mac Sai gives you the whole toolkit, in the open.

• Free, forever. No subscription, no in-app purchases, no "upgrade to Pro", no nag screens. BSD-3 licensed.
• Zero telemetry. No analytics, no crash reporter, no trackers, no server to phone home to. And you do not have to take our word for it, verify it yourself in two commands.
• Every major CleanMyMac tool, in one app. 17 modules across cleanup, protection, performance, applications, and disk insight, plus a menu-bar widget.
• Safe by design. Trash-first deletion, a protected-paths blocklist, symlink and TOCTOU guards, and a SafetyGuard that validates every path. It is built to never lose your data.
• Apple-notarized and fully open source. Your Mac verifies the signature every launch, and every line is here to read.