You've deleted your photos. Emptied the Trash. Somehow "System Data" still eats 80 GB and macOS won't tell you what's in it. CleanOS shows you every hidden gigabyte — caches, duplicates, forgotten apps — and cleans them safely.
Requires macOS Tahoe or later · Apple Silicon only (Intel Macs not supported)
Everything recoverable from Trash · 14-day money-back guarantee
Here's what we found — review each below.
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
One scan, three cleaners
Hit Scan once. CleanOS works through your junk, duplicates, and unused apps in sequence — and shows you exactly what it found before anything moves.
Caches, logs, temp files, iOS backups — plus developer leftovers most cleaners miss: DerivedData, old simulators, node_modules, package caches.
scans ~/Library, /tmp, Xcode & more
A five-stage pipeline confirms every match byte-for-byte before it's ever grouped — so "duplicate" means identical, not just similar.
size → clone check → hash → byte-verify
See what you haven't opened in 90+ days, with real last-used dates. Remove apps along with their leftover support files in one step.
reads actual last-opened metadata
Junk Cleanup
Caches, logs, temp files, leftover iOS installers — plus the developer clutter other cleaners skip entirely.
Duplicates
A five-stage pipeline — size, clone check, fast hashing, then a final byte-for-byte comparison — before anything is ever grouped for removal.
Unused Apps & Files
Real last-opened dates for every app and forgotten file — remove them along with their leftover support data in one step.
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.
Not for you? Full refund within 14 days of purchase, no questions asked.
Nothing is permanently deleted — every cleaned item stays recoverable until you empty the Trash.
Scanning is 100% local. No uploads, no analytics, no accounts required to scan.
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
"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.
Every purchase comes with a 14-day money-back guarantee, no questions asked. Email support and you'll get a refund.
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 only · notarized by Apple