Smart folders: a search that updates itself

Instead of running the same search over and over, save the search itself. Most people type the same query — recent invoices, fresh screenshots, documents edited this week — into Finder again and again, even though it can be set up once and left to keep itself current.

A typical scenario

At the end of the month, a freelancer needs to go through every invoice they've issued or received for the period, wherever it happens to be stored on the drive — in Documents, in a downloaded email, on the Desktop. Without a smart folder, that means typing the search "invoice" all over again each time and sorting through the results by hand, because it's essentially the same search, just with a different date.

With a smart folder, the rule gets set once — file type PDF, name containing "invoice," last-modified date — and from then on all it takes is opening it. Finder always shows the current state of the drive inside it, with no need to run the same search again.

How to do it

1. In Finder, choose File → New Smart Folder (or a keyboard shortcut, if you've assigned one in System Settings).
2. Use the + button in the top right to add one or more rules: file kind, creation or modification date, name, size, or even text contained inside.
3. Rules can be combined using the toggle at the top — "all" for the intersection of conditions, or "any" for broader results.
4. Results update live as you adjust the rules, so you immediately see how many files match.
5. Click Save, name the folder, and choose whether to also add it to the Finder sidebar for quick access.
6. From then on, the smart folder's contents update automatically — a new file that meets the conditions appears in it on its own, with no need to repeat the search.
7. A smart folder doesn't duplicate files or take up extra disk space — it's just a saved filter that displays links to the originals wherever they actually live.

The best tools

• Finder's built-in smart folders — free, work instantly, and cover the vast majority of repeat searches.
• Smart albums in Photos — the same principle applied to photos, say "selfies from the last year" or "photos with a specific person."
• Finder tags — combined with color tags, a smart folder can filter by your own categorization too, not just system metadata.
• Hazel (paid tool) — for power users who want to not only search but also automatically move and rename files based on similar rules.

What you get out of it

• Time: no more retyping the same search query — for recurring tasks like bookkeeping or cleanup, that's easily several minutes a week.
• Visibility: you always see the current state, with no risk of missing something because it's sitting in a different folder than where you last searched.
• Less disk chaos: you don't have to manually sort files into folders by type — a smart folder finds them wherever they are, while the original stays exactly where the system or app put it.
• Consistent rules: once a condition is set, it applies the same way every time, so results don't depend on remembering the exact right keywords each time you search.

Pro tip

Great combinations to try: "recently opened documents" (a quick way back to work in progress), "screenshots older than a month" (for a regular desktop cleanup), or "invoices by filename" (at the end of every month, one glance tells you what to issue or what's still owed).