OnyX: An Excellent Mac Maintenance Tool to Boost Performance

Onix How To

Keeping a Mac tuned up tends to be a fairly easy task. However, even though Macs are far more reliable in this respect than Windows PCs, they still tend to start behaving weirdly from time to time. Some common symptoms of your Mac not performing OK are:

In most of these cases the problem can be solved by simply opening the Activity Monitor utility and looking for the process that’s taking more CPU than usual. But there are scenarios where other more complex issues might be affecting your Mac. For this, there is a great, free application called OnyX that has been around for quite some time.

But you don’t have to wait until something happens to your Mac to use OnyX, since this utility is also a great app to keep your Mac running at its best when used as a prevention tool.

Here’s how to use the most basic aspects of this neat maintenance tool.

Important Note: While OnyX has many basic commands, it is an advanced tool that can affect your Mac deeply, so make sure you know what you are doing and also to have a backup of all the files on your Mac.

Installing & First Steps

Head to this website to find and download the version of OnyX that is right for your Mac. Once you download it, install it and give it access to your Mac’s accessibility features.

Onix Download
Onix Access

Once ready, OnyX will automatically perform a check of your Mac’s S.M.A.R.T. (Self Monitoring Analysis and Reporting Technology) status and its volume (disk/s) structure. This might take a while depending on the kind of Mac you have and the size of its hard drive(s). Be aware though: All browsers and other running apps will close for this process to take place.

Onix First Checkup
Onix First Done

After this initial check up is done, you can choose from among the five main options of OnyX, each assigned to its own tab: Maintenance, Cleaning, Utilities, Automation, and Parameters.


On OS X, the system automates its cleaning process using a unique utility. By clicking on this tab, you are able to run this utility using a few BSD standard scripts, all of which perform different maintenance duties.

Onix Maintenance


The next tab, Cleaning, displays six different tabs, each of which allows you to perform a thorough cleaning duty across your system, like removing the System or User Cache of various components of your Mac, getting rid of old internet files, deleting the cache of all user elements and much more.

Onix Cleanning 1
Onix Cleanning 2
Onix Cleanning 3


The Utilities tab works like a sort of ‘hub’ from which you can access and run some of the most important utilities on your Mac, as well as execute some important tasks like Force Emptying the Trash, finding a file or folder with ease, choosing the visibility status of a disk on your Mac and more.

Onix Utilities


The Automation tab is segmented in different areas and this is where you can access many of the main functions of OnyX in order to automate their operations.

Onix Automation


This last tab – Parameters – includes ten tabs from which you can access the majority of the parameters to fully personalize your working environment. Even better, both OS X and quite a few of Apple’s own applications contain several hidden functions, and all of these are accessible through this tab.

Onix Parameters

And don’t forget: Most of these processes will take quite a while to perform, and in some cases will even prompt you to restart your Mac. This is perfectly normal.

So, to sum up, if you have a Mac there is no reason not to have OnyX on your system. The app is free and even if you don’t use all of its advanced functions, the basic ones are enough to keep your Mac running smoothly for a long time.

Last updated on 03 February, 2022

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