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Home > OnyX


OnyX is a multifunction utility that you can use to verify the structure of the system files, to run miscellaneous maintenance and cleaning tasks, to configure parameters in the Finder, Dock, Safari, and some of Apple's applications, to delete caches, to remove certain problematic folders and files, to rebuild various databases and indexes, and more.

Release Notes

WARNING:
There is a specific version of OnyX for each major version of the operating system.
Use the specific version, and don't try to use a non-compatible version.

Logo OnyX

OnyX 3.7.0 for macOS Catalina 10.15

Requirements: Mac Intel computer running macOS Catalina 10.15.

This version of OnyX will be available 10-15 days after the final version of macOS Catalina is released.

OnyX logo

OnyX 3.6.5 for macOS Mojave 10.14

Download (5.6 MB)

Requirements: Mac Intel computer running macOS Mojave 10.14.
SHA-256 digest: 052ec970aa5ab6fe9b1b51b6c00d9ad336e9b5e957450553d96754ebbc2544d1

OnyX logo

OnyX 3.4.9 for macOS High Sierra 10.13

Download (8.3 MB)

Requirements: Mac Intel computer running macOS High Sierra 10.13.
SHA-256 digest: 60e4f56fb2e5457aca1aa1d2a9be95502a310b0de75112e91b7c89bf4a2be829

OnyX logo

OnyX 3.3.1 for macOS Sierra 10.12

Download (30.8 MB)

Requirements: Mac Intel computer running macOS Sierra 10.12.
SHA-256 digest: 887272335926005f49bbd35f66eb3ea5a6c19d3a35a8fada68357ab5860a7c1b

OnyX logo

OnyX 3.1.9 for OS X El Capitan 10.11

Download (33.1 MB)

Requirements: Mac Intel computer running OS X El Capitan 10.11.
SHA-256 digest: 7f8df2c9e97eb465aba88b000fa2f58958421efeba1239303ff0071e9b7b0536

OnyX logo

OnyX 3.0.2 for OS X Yosemite 10.10

Download (29.6 MB)

Requirements: Mac Intel computer running OS X Yosemite 10.10.
SHA-256 digest: 9672a1b300501ec7c726508561c885f2b5e82069ef65145796dc40b0d386a8b0

OnyX logo

OnyX 2.8.9 for OS X Mavericks 10.9

Download (19.6 MB)

Requirements: Mac Intel computer running OS X Mavericks 10.9.
SHA-256 digest: 01fe01a4e2acdc55383fbe12eea9e2c32659cf1fc283f021987a356bdf820a58

OnyX logo

OnyX 2.7.4 for OS X Mountain Lion 10.8

Download (23.4 MB)

Requirements: Mac Intel computer running OS X Mountain Lion 10.8.
SHA-256 digest: e025125b06fc78322347f8549871c67e570131af83e8bb18b62ed43b65d7369d

OnyX logo

OnyX 2.4.8 for Mac OS X 10.7

Download (19 MB)

Requirements: Mac Intel computer running Mac OS X 10.7.
SHA-256 digest: e637359020d3514cf1fe40d1f616692919c41aed926a395bbc7093b256e42e35

OnyX logo

OnyX 2.4.0 for Mac OS X 10.6

Download (22 MB)

Requirements: Mac Intel computer running Mac OS X 10.6.
SHA-256 digest: 188c15090988b379dce9f0fafa7b686c6eff2ada147cde150b16e1ae01e4e9e4

OnyX logo

OnyX 2.0.6 for Mac OS X 10.5

Download (20.5 MB)

Requirements: Mac PowerPC or Intel computer running Mac OS X 10.5.
OnyX only runs from an administrator account.

OnyX logo

OnyX 1.8.6 for Mac OS X 10.4

Download (9 MB)

Requirements: Mac PowerPC or Intel computer running Mac OS X 10.4.
OnyX only runs from an administrator account.

OnyX logo

OnyX 1.5.3 for Mac OS X 10.3

Download (2.9 MB)

Requirements: Mac computer running Mac OS X 10.3 with BSD subsystem.
OnyX only runs from an administrator account.

OnyX logo

OnyX 1.3.1 for Mac OS X 10.2

Download (1.2 MB)

Requirements: Mac computer running Mac OS X 10.2 with BSD subsystem.
OnyX only runs from an administrator account.