Hazel does the cleanup you keep forgetting, on a schedule
Rules that watch folders and act on them. What it is genuinely good at for storage, what it costs, and where it does not help.
Most storage advice is a list of things to do occasionally, which means a list of things you will not do. Hazel is the tool for the subset of that list which can be expressed as a rule, and for those it works quietly and permanently.
What it does
You point it at a folder and write rules: if a file is older than 30 days, move it here. If it is a disk image and the app is installed, trash it. If it came from a camera, rename it by date and file it. The rules run automatically whenever the folder changes.
The rules worth writing for storage
| Folder | Rule | Effect |
|---|---|---|
| Downloads | Trash .dmg and .pkg older than 14 days | The single biggest recurring win |
| Downloads | Move anything older than 90 days to an archive folder | Stops the folder growing |
| Desktop | File by kind into subfolders | Keeps it countable |
| Screenshots | Move to a dated folder, delete after 60 days | Screenshots are endless |
| Any project folder | Trash .zip exports older than a month | Removes derived data |
The feature that is genuinely relevant here
Hazel can watch for applications being deleted and offer to remove their support files, which is the recurring problem behind what uninstalling leaves behind. Doing that at the moment of deletion is far more reliable than auditing leftovers years later.
Where it does not help
- Caches and system folders. Those are not rule shaped, and clearing them on a schedule is the wrong habit anyway.
- Deciding what matters. A rule cannot tell an important download from a disposable one, so rules work best where the category is unambiguous.
- One off cleanups. The first big clear out is a manual job; Hazel keeps it from recurring.
Whether it is worth $42
If your storage problem is recurring clutter in a few known folders, yes, because it solves that permanently rather than monthly. If your problem is one 80 GB folder you have not found yet, a rules engine is not the tool: find it first, and consider automation for what comes after.
The free version of the same idea is the monthly routine, which takes ten minutes and requires you to remember.
Common questions
What does Hazel do on a Mac?
It watches folders you choose and acts on files automatically according to rules: moving, renaming, filing, archiving or trashing based on age, kind, name or source.
How much does Hazel cost?
Hazel 6 is $42, with a $65 family pack for up to five household members and a $20 upgrade from a previous version, checked in September 2026. A free trial is available.
Is Hazel useful for freeing disk space?
For recurring clutter, yes: rules that trash old installers and file downloads keep folders from growing. It does not help with caches, system folders or finding a large folder you have not identified.
Can Hazel remove app leftovers?
It can watch for applications being deleted and offer to remove their support files at that moment, which is more reliable than auditing leftovers long afterwards.