OnyX 2.7.3_

Comprehensive maintenance for your Mac


  • Cleans and optimizes all aspects of your Mac
  • Verifies S.M.A.R.T and structure of disk
  • In depth cleaning
  • Easy to use


  • Some operations can take time
  • Each version of OS X requires a different OnyX
  • Basic interface


OnyX is a simple but incredibly powerful maintenance and optimization tool for OS X. Note that this version is only for Mountain Lion. There are alternative downloads for OS X 10.2, 10.3, 10.4, 10.5 and 10.7.

Onyx is completely free and will help you keep your Mac clean and in perfect running order. The first time you run OnyX it'll verify S.M.A.R.T status of your disk to prevent failure and analyze the structure of your volume. Every action is well explained and OnyX also includes a help guide for anything you're not sure.

OnyX allows you to set a number of parameters to check including Dock, Exposé, iTunes and Spotlight. It is most effective at fully cleaning your files including system, user and fonts. You'll have to make sure all other applications are closed to allow it to perform all the tasks it needs to do. The automation section in OnyX will let you maintain, rebuild and clean your drive.

Obviously, some of these operations will take some time to perform. However you should see some notable improvements in the way your Mac runs afterwards. The only downside to Onyx is the overall interface which is very basic but it's a minor drawback to an excellent app.

OnyX is a very handy application to have around. It'll ensure your Mac is always clean and tidy. And best of all, it's completely free.

New application developed in AppleScriptObjC now


  • New application developed in AppleScriptObjC now


OnyX 2.7.3_

User reviews about OnyX

  • by Anonymous

    Onyx is OVERRATED and doesn't fulfil promises!.
    Onyx BETA and the version just before it LOCK UP when dealing wi...   More

  • by Nick Mead

    @Just seemed to hang!.
    Was it the first time you've tried to repair permissions on your Mac? If so, it is quite ...   More

  • by Anonymous

    Just seemed to hang!.
    Repair permissions was possibly still running after an hour, so I forced quit. It doesn't ...   More

  • by Nick Mead

    Are you sure you are running the right version of Onyx for your system? When you click Download, select t...   More

  • by Anonymous

    i download onyx and when i try to launch it it doesn't let me it says that it the application quit unex...   More

  • by Anonymous

    Great Tool.
    I was not able to make use of 2.1.9 because I have a 10.4.1 system, but I was able to download an ol...   More