What is OnyX?
OnyX is a free multifunction utility for macOS from Titanium Software. It verifies the startup disk and the structure of its system files, runs cleaning and maintenance tasks, deletes caches, rebuilds databases and indexes, uninstalls applications, and changes hidden settings of the Finder, Dock, Safari and other Apple apps. A separate build is published for each major macOS version, and the developer asks only for optional donations.
OnyX is free to use. See every plan
Good for
- Mac users who want maintenance and cache cleaning without Terminal commands
- People who want to change hidden Finder, Dock and Safari settings
- Owners of older Macs, since builds exist for many past macOS versions
Worth knowing
- macOS only. Each major macOS version needs its own OnyX build, and the vendor warns against running a build made for an earlier system.
- The current version, 5.1.0, requires a Mac with Apple silicon on macOS Golden Gate 27; Intel Macs stop at OnyX 5.0.6 for macOS Tahoe 26.
- Builds for earlier macOS versions are discontinued and will not be updated, although they can still be downloaded.
- It is freeware, not open source: the license allows copying and sharing it but not modifying it for distribution.
Key features
- System file verification
- Checks the startup disk and the structure of its system files, a job that otherwise means typing commands in Terminal.
- Maintenance tasks
- Runs miscellaneous maintenance jobs and rebuilds various databases and indexes. The vendor's separate Maintenance app is a subset of this part of OnyX.
- Cache and file cleaning
- Deletes application, font and system caches and removes certain folders and files that are known to cause problems.
- Hidden settings
- Turns hidden options on or off in the Finder, Dock, Safari and other Apple applications, the same controls the vendor ships separately as Deeper.
- Application uninstaller
- Removes an application together with its related files and folders. The 5.1.1 release in progress lists an improved uninstaller.
- A build for each macOS version
- Version 5.1.0, released on September 15, 2026, targets macOS Golden Gate 27, and older builds stay downloadable for systems back to Mac OS X 10.2.
OnyX pricing
- Starts at
- Free
- Free plan
- The vendor says all its applications are free and fully usable for as long as you want, with no registration. It calls them donationware; a PayPal donation is optional.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| OnyX | $0 | The complete utility, including the functions of the vendor's Maintenance, Deeper, CalHash and Schedulizer apps. No registration or license key. |
Read from titanium-software.fr on Oct 9, 2026. Prices change, so confirm with OnyX before you buy.
OnyX alternatives
- OnyX vs CleanMyMac
Free trial · from $39.99/yr
- OnyX vs DaisyDisk
Free trial · from $9.99 one-time
- OnyX vs CCleaner
Free plan · from $44.95/yr
Common questions
Is OnyX free?
Yes. OnyX is free to use. The vendor says all its applications are free and fully usable for as long as you want, with no registration. It calls them donationware; a PayPal donation is optional.
How much does OnyX cost?
OnyX lists one plan. OnyX: $0. Prices were read from titanium-software.fr on Oct 9, 2026.
What platforms does OnyX work on?
OnyX is available on macOS.
Does OnyX have an Android app?
No Android app was listed when its pages were read on Oct 9, 2026. OnyX is listed for macOS.
Does OnyX have an iPhone app?
No iPhone app was listed when its pages were read on Oct 9, 2026. OnyX is listed for macOS.
Is OnyX open source?
OnyX is not described as open source on its own site, as read on Oct 9, 2026.
Does OnyX work offline?
Yes, according to its own site. What works without a connection differs by plan and platform, so check the vendor's page for the detail.
Who makes OnyX?
OnyX is made by Titanium Software. It dates from 2003.
What are the alternatives to OnyX?
The closest alternatives to OnyX in our directory are CleanMyMac, AppCleaner, Pearcleaner, DaisyDisk and CCleaner. Each one has a side-by-side comparison with OnyX.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 9, 2026.