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OnyX is a multifunction utility that you can use to verify the startup disk and the structure of its 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.

What's New

Version 3.2.9:
  • Update routine improved
  • Bug corrected that occurred when resetting the default settings in the Login tab
  • Bug corrected that occurred in some cases when repairing permissions
  • Deleted the obsolete High Contrast mode of iTunes
  • Integrates version 3.20.1 of SQLite3
  • Misc. minor corrections made


  • macOS 10.12.x

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OnyX User Discussion

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Current Version (3.x)


Downloads 4,881,539
Version Downloads 4,134
License Free
Date 14 Sep 2017
Platform Intel 64 / OS X
Price Free
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