macOS piles caches, containers, Docker images and Xcode data into one gray "System Data" bar it refuses to explain — often tens of gigabytes. CleanOS names every gigabyte and clears what's safe.
First time opening CleanOS? Right-click the app → Open, then confirm — a one-time step since CleanOS isn't notarized yet.
Requires macOS Tahoe or later · Apple Silicon and Intel supported
Caches, logs, temp files and developer leftovers — all in one place. A single scan surfaces the reclaimable junk hiding on your Mac, every item safety-rated before anything moves.
Identical copies scattered across your Documents, Downloads and photo library — confirmed byte-for-byte before they're ever grouped. One original is always kept.
One dashboard runs junk, duplicates and System Data together and hands you the next step — so a clean Mac becomes a one-click habit, not a weekend project.
How it works
One click scans your whole Mac — app caches, developer leftovers, duplicates, System Data, apps you haven't opened in months. Watch it work file by file, live.
Free, no account needed to scan
Every item is listed with its exact size, location, and a safety rating — Safe, Review, or Risky. Nothing is preselected that could touch your personal data.
Safety ratings on every single item
Cleaned items go to the macOS Trash, not into the void. Changed your mind? Put it back. Nothing is gone until you empty the Trash yourself.
Everything recoverable until you say so
The mystery category
macOS lumps caches, logs, Time Machine snapshots, old iOS backups, and developer leftovers into one gray bar it refuses to explain. CleanOS names every gigabyte — and cleans the ones you don't need.
Why CleanOS
| CleanOS | Typical Mac cleaners | Doing it manually | |
|---|---|---|---|
| Explains System Data item by item | ✓ | Partially | — |
| Byte-verified duplicate detection | ✓ | Hash-only | — |
| Everything goes to Trash first | ✓ | Varies | ✓ |
| Finds Xcode & dev-tool leftovers | ✓ | Rarely | Hours of work |
| Works fully offline, zero telemetry | ✓ | Varies | ✓ |
| Lifetime option | $19.99 once | $30–40 every year | Free (your weekend) |
Once. Not per year. Most cleaners charge more than that annually, forever.
Local. Your files are scanned on your Mac and never leave it. No telemetry, no uploads.
Duplicate verification, ending in a byte-for-byte comparison. Zero false positives by design.
Pricing
No subscription. Scan for free and see everything CleanOS finds — unlock cleaning when you're ready.
The free version scans and shows you everything. It cannot delete anything — Clean, Delete, and Uninstall all require a paid plan.
Download freeBuilt to be trusted
Nothing is permanently deleted. Every cleaned item is recoverable until you empty the Trash yourself.
Duplicates are confirmed byte-for-byte before grouping — a hash match alone is never enough to delete.
No accounts, no analytics, no uploads. CleanOS scans locally and your file data stays on your machine.
Files stored only in iCloud are skipped, never force-downloaded — your scan stays fast and your bandwidth stays yours.
FAQ
CleanOS isn't notarized by Apple yet, so macOS shows this warning on first launch for any app from outside the App Store. It's not actually damaged. To open it: right-click (or Control-click) the CleanOS app → Open → click Open again in the dialog that appears. You only need to do this once. If that doesn't work, go to System Settings → Privacy & Security, scroll down, and click Open Anyway next to the CleanOS message.
"System Data" is where macOS puts everything it can't categorize: app caches, logs, Time Machine local snapshots, old iOS device backups, browser data, and developer files like Xcode's DerivedData. It grows quietly and macOS gives you no way to see inside it. CleanOS itemizes the whole category — every file, its size, and its location — so you can clean what's safe and keep what matters.
Yes. Everything CleanOS removes goes to the macOS Trash first, so any item can be restored. Junk categories target caches, logs, and temp files that apps rebuild automatically, and duplicates are verified byte-for-byte — one original copy is always kept.
Only if you want it to be. CleanOS offers a $2.49/month plan you can cancel anytime, or a $19.99 lifetime purchase — pay once, keep it forever with free updates. The free version lets you run full scans and see every result, so you can see exactly what CleanOS finds before paying. Cleaning requires a paid plan.
macOS requires Full Disk Access for any app that reads system cache and log folders. CleanOS uses it only to scan and clean — nothing is transmitted anywhere, and there are no analytics or accounts.
CleanOS runs on macOS 14 Sonoma and later, on both Apple Silicon and Intel Macs. It's a native Swift app — no Electron, no background agents eating your battery.
Download and scan for free first — you'll see everything CleanOS finds on your Mac, with full file names, sizes, and locations, before you ever pay anything. Cleaning is the only part that requires a paid plan, so you can fully evaluate CleanOS on your own Mac before buying. All sales are final; see our Terms for details.
Scan free, see every hidden gigabyte with nothing held back — pay only if you want CleanOS to do the cleaning. Most Macs are showing results in about a minute.
Scan my Mac — freeRequires macOS Tahoe or later · Apple Silicon and Intel supported