Version: 2.8.1 || Release Date: 2013-06-22 || License: Freeware Developer: Titanium Software | App Owner: arne

OnyX is a multifunction utility for Mac OS X.

OnyX allows you to verify the Startup Disk and the structure of its System files, to run misc tasks of system maintenance, to configure some hidden parameters of the Finder, Dock, Dashboard, Exposé, Safari, Login window and of some of Apple's own applications, to delete caches, to remove a certain number of files and folders that may become cumbersome and more.

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29 Opinions

for Tiger. Version 1.9.5 for Leopard is available.

Without question the best and easiest way to keep your mac in shape.

The best system maintenance/optimization/customization app I have ever used. Hands down. + It's free, unlike other apps like it. I have never tried Applejack though, but I don't really need that kind of power.

Addenda to my previous post:
The installer has returned in the latest nightly build of OnyX 1.9.0 for Leopard, released just today. (No more drag & drop to install.)

I don't know what beta version Cayayofm is talking about, but yesterday I noticed a strange behaviour of OnyX 1.9.0 (lhe latest nightly build).
I launched OnyX and just took a look at the features. I did not run any routine, so I suppose it did not perform any action. (And I did not click any button by mistake.) Then I quit OnyX.
When I activated the Dashboard, all widgets were starting again, just like they do the first time you launch the Dashboard after a boot. (I don't remeber this beahviour when I had Tiger installed.)
I have already emailed the developer about this and I'm waiting for a reply.
Just one more note: The installation of this new version for Leopard is now done by drag & drop. No more installer to run.

Version 1.8.4 is for Tiger only.
Nightly builds of version 1.9.0, for Leopard, are already available from the developer's website, at this address:
Please notice that these Leopard versions are currently only localized in French. (English coming soon.)

Has anyone experience problems with the beta on Leopard?

I love onyx... but when i went to WWDC and got the new leopard beta it didnt work.... sooooo i made a little widget that does a fair amount of the maintenance that onyx does.. it is called MaintenanceWidget and can be found on apple downloads, here, or on bradflaugher.com. I just thought that other people might have the same problem. enjoy.

Completely ditched MacJanitor after the first OnyX use. This app rocks and the amount of good it has done to keep my MacBook tip-top is amazing.

A nice free utility combining the power of tweaking your system's hidden settings and running maintance scripts and other speed-improving things. A must-have application in my opinion.

Being free makes it even better.

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