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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 3.4.3:
  • Bug corrected that occurred when showing or hiding the shadow in the window captures
  • Deleting the applications cache improved
  • Deleting the logs improved
  • OnyX doesn't display anymore the user name if it is not administrator


  • macOS 10.13.x

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OnyX User Discussion

4.4 1028


Current Version (3.x)


Downloads 4,950,623
Version Downloads 3,275
License Free
Date 12 Mar 2018
Platform Intel 64 / OS X
Price Free
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