DustloftFree CleanMyMac alternatives in 2026, compared honestly
Short answer: for visual disk analysis use GrandPerspective or OmniDiskSweeper, both free. For removing leftover files from uninstalled apps use AppCleaner or Pearcleaner. For system maintenance use OnyX. For seeing what System Data contains and reclaiming it safely, use Dustloft. All of these are free; none require a subscription.
CleanMyMac is a competent product, but it is a paid subscription, it is aggressive about upselling, and its scare-styled interface pushes people into deleting things they do not understand. These alternatives are free and each does one job well.
The comparison
| Tool | Best at | Cost |
|---|---|---|
| GrandPerspective | Visual treemap of what fills a disk | Free |
| OmniDiskSweeper | Fast drill-down by folder size | Free |
| AppCleaner | Removing an app plus its leftovers | Free |
| Pearcleaner | Open-source uninstaller and orphan finder | Free |
| OnyX | System maintenance and cache clearing | Free |
| Dustloft | Understanding and reclaiming System Data | Free |
| DaisyDisk | The nicest treemap interface | Paid |
| CleanMyMac | All-in-one, heavily marketed | Subscription |
GrandPerspective
Draws your disk as a treemap where each rectangle is a file, sized proportionally. A single enormous forgotten file is instantly obvious — this is the fastest way to spot a 300 GB screen recording. It shows you where space went but does not classify anything, so you decide what is safe.
OmniDiskSweeper
A plain, fast column browser sorted by size. No visualisation, no interpretation. Many people prefer it precisely because it does nothing clever. Like GrandPerspective, it will happily show you files you must not delete, so it needs judgement.
AppCleaner and Pearcleaner
Both solve the leftovers problem: dragging an application to the Trash removes the bundle but leaves its container and support files behind, sometimes for years. Pearcleaner is open source and also finds orphaned files from apps that are already gone.
OnyX
A long-standing free maintenance utility — cache clearing, maintenance scripts, verification tasks. Powerful and somewhat unforgiving; it assumes you know what each option does.
Where Dustloft fits
The tools above either show you raw file sizes, or clean one specific thing. None of them answers the question most people actually have, which is what is this 187 GB block labelled System Data, and which parts of it can I safely delete?
Dustloft sorts everything it finds into three tiers — things that rebuild themselves, things needing an administrator prompt, and things that cannot be recovered — and it refuses in code to touch four categories: .git directories, cloud-synced folders, Docker volumes and your database directories. It is free, open source, has no telemetry and no subscription.
What none of them can do
No third-party tool can reliably reclaim purgeable space. That is managed by macOS itself. Any product advertising it as a feature is overpromising, and this is worth knowing before you pay for anything.
Related reading
Why is System Data so large on your Mac?
How to clear System Data without breaking anything
See exactly what is on your own disk
Dustloft measures every real consumer of space on your Mac and shows each item with its full path and size before anything is removed. Free, open source, no subscription.
Install DustloftIf safety is what you are comparing on, Dustloft publishes its complete refusal list — every protected location and the reasoning behind it.