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An OnyX alternative for people who want fewer switches

OnyX has been a staple of Mac maintenance for two decades, it is free, and it is more powerful than most paid utilities. It is also unapologetically an expert tool: tabs full of checkboxes, system flags with no explanation, and the assumption that you know what rebuilding the launch services database will do. If that assumption does not hold for you, here is how the alternatives compare — honestly, including where OnyX still wins.

Updated 2026-08-02 · Written by the CleanerMac team · macOS 13–15 tested

What OnyX does better than CleanerMac

OnyX goes deeper into macOS than we do, and it does it for free. It can run the system's periodic maintenance scripts, rebuild the launch services and Spotlight databases, verify the startup disk's structure, repair permissions on user files, rebuild the dyld shared cache, and expose dozens of hidden system and application settings that Apple never surfaced in System Settings. It can also delete a much wider set of caches than we touch, including several system-level ones we deliberately leave alone.

If you are an administrator, a technician, or an experienced user who wants surgical control over macOS internals, OnyX is an excellent tool and it costs nothing. There is no version of this comparison where we tell you to pay for something OnyX already does better for you. It is also worth noting that OnyX is version-specific: you download the build matching your macOS release, which is a sign of how closely it tracks system internals.

Where OnyX asks a lot of you

The trade-off is that OnyX explains very little at the point of decision. A checkbox reads Rebuild the LaunchServices database and does not tell you what happens if you get it wrong, how long it takes, or whether you need to restart. Options are grouped by mechanism rather than by outcome, so if your actual goal is my Mac is slow or my disk is full, you have to already know which mechanisms map to it.

OnyX also does not cover several everyday problems at all. It has no duplicate finder. It has no complete app uninstaller that removes leftovers. It does not show you a per-file breakdown of where your storage went with advice attached. It does not surface large files you have not opened in a year. Those are the things most people are actually looking for when they search for a maintenance tool, and they sit outside OnyX's scope by design.

Feature comparison

The safety difference that matters most

Many of OnyX's operations are irreversible by design, which is a reasonable choice for an expert tool. That is a reasonable choice for a tool aimed at people who know exactly what they are asking for, and it is a genuine hazard for anyone clicking hopefully. CleanerMac takes the opposite position where it counts: your own files go to the Trash, so those mistakes are one restore away, and the cache of any running application is skipped automatically by bundle identifier so you cannot pull the rug out from under an app you are using.

Neither app is dangerous in the malware sense — both are legitimate, and OnyX has a long and well-earned reputation. The difference is how much the tool assumes you meant it. Our full evaluation criteria are in are Mac cleaner apps safe.

What CleanerMac covers instead

CleanerMac is built around outcomes rather than mechanisms. Quick Clean sweeps caches and logs in seconds. Disk X-Ray shows exactly where your space went, category by category and file by file, each with a plain-language note about whether it is safe to remove. The Smart Uninstaller removes an app together with its caches, preferences, containers, saved state and login items, matched by bundle identifier. The Duplicate Finder matches by content, so renamed copies are still caught. Developer Deep Clean reclaims stale Xcode and DerivedData while protecting projects you are actively building. Tune-Up puts the common Terminal chores behind buttons: free inactive memory, flush DNS, restart Finder and Dock, reset Quick Look, clear font caches.

It is a native SwiftUI menu-bar app for macOS 13 and later, universal for Apple Silicon and Intel, Developer-ID signed and notarized, updated through Sparkle. Nothing leaves your Mac — no account, no analytics, no uploads — and it is fully localized into 20 languages including right-to-left ones, which matters more than people expect when the buttons decide what gets deleted.

Which one should you use

Use OnyX if you want deep macOS maintenance, you are comfortable with irreversible operations, and free is the right price for you. Use CleanerMac if your real problems are disk space, duplicates, app leftovers and a Mac that feels sluggish, and you want those solved in plain language with a Trash-based safety net. They also coexist happily: OnyX for the occasional deep maintenance pass, CleanerMac for the monthly routine.

If you are still mapping the category, our best Mac cleaner guide lays out all four types of tool, and the Mac cleaner overview covers the basics.

A practical maintenance routine

Most Macs need very little. Once a month, clear caches and logs — see how to clear cache on Mac for the manual method. Empty Downloads of old disk images. Remove apps you have not opened in a year using the complete uninstall guide. Twice a year, run a duplicate scan. If your Mac feels slow rather than full, the causes are usually memory pressure, a nearly full startup disk or too many login items rather than anything OnyX-shaped — how to speed up a Mac works through them in order, and how to free up space handles the storage side.

Reach for deep system maintenance only when you have a specific symptom that calls for it: Spotlight not finding files, the wrong app opening your documents, a stubborn Finder glitch. Running maintenance scripts on a healthy Mac out of habit does not make it faster.

Maintenance in plain language

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macOS 13+ · Apple Silicon & Intel · $24.99 once, no subscription