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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 3.3.7:
  • Bug corrected that occurred when opening the Parameters pane
  • Bug corrected that occurred when deleting the IconServices Cache


  • macOS 10.13.x

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OnyX User Discussion

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4.5 1011


Current Version (3.x)


Downloads 4,902,140
Version Downloads 5,163
License Free
Date 11 Oct 2017
Platform Intel 64 / OS X
Price Free