Free since 2003 V5.1.1

Clean and Tune macOS With OnyX for Mac

OnyX clears caches, rebuilds system indexes and exposes hidden settings for Finder, Dock and Safari. One free download, matched to your exact macOS release.

Download OnyX Free 4.8 from 347 Mac users

Version 5.1.1 for macOS 27 Golden Gate. 8 MB DMG for Apple silicon.

Price, with no paid tier

2003

Free updates every year since

macOS releases with a matched build

macOS 27

Required for OnyX 5.1.1

Everything the OnyX Mac Cleaner Handles

OnyX wraps dozens of Terminal jobs in one plain window. You get disk cleaning, index rebuilds and hidden macOS tweaks without typing a single command.

Maintenance in one pass

Check the startup disk, rebuild the Spotlight and LaunchServices databases, then clear system and user caches. Tick the jobs you want and press Run.

Hidden settings, plain toggles

Change the screenshot format and folder, reveal hidden files in Finder and tune Dock and Safari behavior. Tahoe builds even reshape window corners.

Automation: your routine, one click

Pick a set of cleaning and rebuild tasks once. OnyX remembers the list, so next month your whole tune-up starts with a single button.

Automation pane

Uninstall apps fully

Remove an app together with the support files it scattered across your Library. The latest release made this uninstaller faster and more thorough.

Utilities and Mac info

Open hidden Apple apps, read Terminal man pages, compute file checksums and view hardware details. Handy tools that macOS keeps out of sight.

Safe by design

Each OnyX build runs only on the macOS it targets. It asks for your admin password, explains every task and ships with zero ads or accounts.

Terminal installation

Advanced users can install OnyX with a single Homebrew command.

$brew install --cask onyx

How to open Terminal on Mac

1Press ⌘ + Space to bring up Spotlight.
2Type Terminal in the search field.
3Hit Return and a fresh shell window opens.

Installation via Terminal command

1Copy the Homebrew command shown above.
2Paste it into Terminal, then press Return.
3OnyX lands in your Applications folder, ready to open.

No Homebrew? Install it from brew.sh, or grab the DMG straight from Titanium Software.

Download DMG

How OnyX for Mac Works

Three short steps take you from a sluggish onyx macos setup to a fresh, tidy system.

Open and approve

Launch OnyX and enter your admin password. Then allow it under Full Disk Access in Privacy & Security so cleaning reaches every folder.

Pick your tasks

Open Maintenance and tick what you need: verify the disk, rebuild indexes or clear caches. A short note explains each option.

Run and restart

Click Run Tasks and OnyX works down the list. Your Mac restarts at the end so macOS can rebuild everything clean.

Skip the Terminal. Tick a Box Instead.

Every job below needs a precise command and often sudo. OnyX runs the same work from a checklist, with the right syntax for your macOS built in.

Terminal by hand

Rebuild the Spotlight index

sudo mdutil -E /

Flush the DNS cache

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

Show hidden files in Finder

defaults write com.apple.finder AppleShowAllFiles -bool true

Move screenshots to a new folder

defaults write com.apple.screencapture location ~/Pictures/Shots

OnyX one window

Rebuild Spotlight index
Clear DNS cache
Show hidden files
Set screenshot location
Run Tasks

Pick the build that matches your Mac

Titanium Software ships a separate OnyX for each macOS release. Running an older build on a newer system is the most common mistake.

macOS 27 Golden Gate

5.1.1

macOS 26 Tahoe

5.0.6

macOS 15 Sequoia

4.8.5

macOS 14 Sonoma

4.6.2

macOS 13 Ventura

4.4.7

macOS 12 Monterey

4.2.7

What Mac Users Say About OnyX

Rated 4.8 out of 5 from 347 reviews

I've installed OnyX on every Mac I've owned since my old white MacBook. Version 5.1.1 runs clean on Golden Gate and still feels like the same trusty onyx mac tool.

Hamza R.

Spotlight stopped finding my files after a system update. One rebuild in OnyX fixed it within ten minutes. No Terminal and no guesswork.

Elena V.

Great onyx mac cleaner, though the interface looks a bit old school. Once you learn the panes it does more than two paid apps I tried last year.

Tom H.

As a free onyx disk cleaner it cleared 6 GB of caches and logs on my 256 GB MacBook Air. The restart afterwards felt snappier too.

Priya S.

The Parameters tab is my favorite part. I moved screenshots into their own folder and switched them to JPG in two clicks.

Lucas M.

I built an Automation list once. Now my monthly cleanup takes a single click and a coffee break.

Noor A.

I like that every onyx macos release gets its own build. It never pokes at settings the system no longer supports.

Daniel W.

Found the integrated sidebar toggle for Tahoe and finally got my old Finder look back. That alone made OnyX for Mac worth keeping.

Sofia G.

Developer friendly. I flush DNS and rebuild LaunchServices from one window instead of digging through my shell history.

Kenji T.

OnyX for Mac: Common Questions

Straight answers about versions, safety and installation.

Is OnyX for Mac really free?

Yes. OnyX has been freeware since 2003, with no trial, subscription or paid tier. Its developer, Joël Barrière of Titanium Software, accepts optional donations on his website.

Which OnyX version do I need for my macOS?

Each major release gets its own build. Use 5.1.1 for Golden Gate, 5.0.6 for Tahoe, 4.8.5 for Sequoia, 4.6.2 for Sonoma, 4.4.7 for Ventura and 4.2.7 for Monterey. Never run a build made for an older system.

Is OnyX safe to use on macOS?

Yes. OnyX only runs on the macOS it targets, asks for your admin password and explains each task first. Most jobs clear caches that the system recreates by itself. A Time Machine backup before deep maintenance is still a smart habit.

Does OnyX work on Intel Macs?

OnyX 5.1.1 for macOS 27 Golden Gate needs Apple silicon. Intel Macs running macOS 26 Tahoe can use OnyX 5.0.6, which supports both chip types.

What does the OnyX disk cleaner remove?

It clears system, user and app caches along with logs, internet files, recent items and junk items. Downloaded screen savers and wallpapers go too. You can also wipe browser history or uninstall apps with their support files.

How do I install OnyX via Terminal?

With Homebrew set up, run brew install --cask onyx and the app lands in Applications. Prefer a manual route? Download the DMG from the official Titanium Software server.

Why does OnyX ask for Full Disk Access?

Cleaning tasks reach protected folders like Mail, Safari and system caches. macOS blocks those paths until you add OnyX under System Settings, Privacy & Security, Full Disk Access.

Is onyxmac.net the official OnyX website?

No. This site is an independent guide. Joël Barrière of Titanium Software makes OnyX, and every download link here points to the official titanium-software.fr server.

Give Your Mac a Fresh Start

Free download straight from the developer. No account, no trial timer and no upsell screens.

Download OnyX Free Read release notes

Version 5.1.1 Size 8 MB macOS 27 Golden Gate Rated 4.8/5