OnyX

OnyX is a multifunction utility that you can use to verify the structure of the system files; perform cleaning and computer maintenance tasks; configure parameters in the Finder, Dock, Safari, and some Apple applications; delete caches; remove certain problematic folders and files; rebuild various databases and indexes; and more. It is a reliable application that provides a clean interface to many tasks that would otherwise require complex commands to be typed using a command–line interface.

Since 2003, I have devoted considerable time to developing these applications so that all Mac users can use them freely. If you would like to help, you can make a donation.

IMPORTANT:

There is a specific version of OnyX for each major operating system version.
Use the correct version, and don’t try to use a version intended for an earlier operating system.

OnyX 4.9.2 for macOS Tahoe 26

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Tahoe 26.
Released: October 27, 2025

Old versions

Titanium Software has discontinued developing the old versions and will no longer update them; however, you can still download them.

OnyX 4.8.5 for macOS Sequoia 15

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Sequoia 15.
Download (7.1 MB)

OnyX 4.6.2 for macOS Sonoma 14

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Sonoma 14.
Download (6.8 MB)

OnyX 4.4.7 for macOS Ventura 13

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Ventura 13.
Download (7.6 MB)

OnyX 4.2.7 for macOS Monterey 12

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Monterey 12.
Download (5.6 MB)

OnyX 4.0.2 for macOS Big Sur 11

Requirements: Intel-based Mac or Mac with Apple silicon using macOS Big Sur 11.
Download (4.9 MB)

OnyX 3.8.7 for macOS Catalina 10.15

Requirements: Intel-based Mac using macOS Catalina 10.15.
Download (4.7 MB)

OnyX 3.6.8 for macOS Mojave 10.14

Requirements: Intel-based Mac using macOS Mojave 10.14.
Download (5.6 MB)

OnyX 3.4.9 for macOS High Sierra 10.13

Requirements: Intel-based Mac using macOS High Sierra 10.13.
Download (8.3 MB)

OnyX 3.3.1 for macOS Sierra 10.12

Requirements: Intel-based Mac using macOS Sierra 10.12.
Download (30.8 MB)

OnyX 3.1.9 for OS X El Capitan 10.11

Requirements: Intel-based Mac using OS X El Capitan 10.11.
Download (33.1 MB)

OnyX 3.0.2 for OS X Yosemite 10.10

Requirements: Intel-based Mac using OS X Yosemite 10.10.
Download (29.6 MB)

OnyX 2.8.9 for OS X Mavericks 10.9

Requirements: Intel-based Mac using OS X Mavericks 10.9.
Download (19.6 MB)

OnyX 2.7.4 for OS X Mountain Lion 10.8

Requirements: Intel-based Mac using OS X Mountain Lion 10.8.
Download (23.4 MB)

OnyX 2.4.8 for OS X Lion 10.7

Requirements: Intel-based Mac using OS X Lion 10.7.
Download (19 MB)

OnyX 2.4.0 for Mac OS X Snow Leopard 10.6

Requirements: Intel-based Mac using Mac OS X Snow Leopard 10.6.
Download (22 MB)

OnyX 2.0.6 for Mac OS X Leopard 10.5

Requirements: PowerPC-based Mac or Intel-based Mac using Mac OS X Leopard 10.5. OnyX only opens from an administrator account.
Download (20.5 MB)

OnyX 1.8.6 for Mac OS X Tiger 10.4

Requirements: PowerPC-based Mac or Intel-based Mac using Mac OS X Tiger 10.4. OnyX only opens from an administrator account.
Download (9 MB)

OnyX 1.5.3 for Mac OS X Panther 10.3

Requirements: PowerPC-based Mac using Mac OS X Panther 10.3 with BSD subsystem. OnyX only opens from an administrator account.
Download (2.9 MB)

OnyX 1.3.1 for Mac OS X Jaguar 10.2

Requirements: PowerPC-based Mac using Mac OS X Jaguar 10.2 with BSD subsystem. OnyX only opens from an administrator account.
Download (1.2 MB)