Onyx review: A must-have utility for your Mac software toolbox

Price When Reviewed

Free

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For more than 20 years, developer Joël Barrière (aka Titanium) has gotten it almost completely perfect, his OnyX donationware utility having been released without much marketing or fanfare, but drawing an ever-growing user community around it that has grown to love it, and for good reason.

OnyX, which presently stands at version 4.7.1 as of this writing and requires macOS 15 (Sequoia) or later to install the current version, is one of the best utilities on the market because, Barrière, in writing and updating the application, has figured out the powerful underlying tools within the macOS operating system and provides easy access to them.

See how Onyx compares to other Mac utilities in our collection of the Best Mac Cleaners.

Once downloaded, installed, granted full disk access, and after the program is launched and an administrator password has been entered, you’re able to run powerful sets of customizable scripts to perform functions such as checking volume structures, getting low-level system specifications, repairing permissions, cleaning up system databases, and sorting out under-the-hood level system minutia in ways that have made OnyX an indispensable tool for every day and power users alike.

Factor in an amazing level of customizability and it’s easy to access complex system functions such as security, login options, Display Calibrator, Keychain Access, the general maintenance script initiating, closing out open applications, and getting to work cleaning up system level errors that can accumulate over time.

All this from a ‘free’ app: OnyX is Donationware, with users asked to send along whatever they believe the program is worth.

In as much as Barrière has worked to make a terrific utility, there’s some room for improvement. The Scheduling feature seems a bit vague and seems to only function around specific days, hours, and minutes as opposed to setting aside specific time periods for this, which felt a bit strange.

Some of Barrière’s users have complained that support is slow in getting back to them when they send along questions or concerns. This could be due to the fact that OnyX could be more of a side project due to being donationware–Barrière also focusing his efforts on other utilities as well, and this being the downside of functioning as a one-person enterprise.

A formal tutorial or set of tutorial videos/an official OnyX tutorial channel on YouTube or another streaming service would also be beneficial. Yes, OnyX is excellent and offers an amazing number of options as to what it can do with your operating system, and the manual explains things well, but a series of introductory tutorials by the author (or a third party hired by the author) could help ease new users into OnyX, alleviate any trepidation they might feel, and show them how to confidently dive into using the program.

Should you use OnyX?

Despite its free price tag, OnyX has always been one of the best examples of donationware in the macOS universe, and Barrière has always offered a steady stream of updates and fixes with the feeling that he took the time to go through the newest fixes and changes sent out by Apple, definitively understood them, and incorporated them into the latest version of OnyX.

The result comes across as a labor of love and devotion to the product, which is always appreciated by the community. Yes, it’d be nice to see a simpler introduction and tutorial setup, as it can feel like you’re plunging into the deep end if you’re a new user coming to the program, but outside this caveat, there’s something great here that’s worth checking out as a standard macOS maintenance tool, no questions asked.