How to organize files on Mac in five steps.

The steps

1. Pick a small folder structure. In Finder, open Documents and choose File > New Folder, or press Shift-Command-N. Start with folders such as Finance, Work, Personal, and Archive. Move a few example files into each so you can check that the names make sense before filing the rest.
2. Tidy the Desktop with Stacks. Click an empty part of the Desktop, Control-click, and choose Use Stacks. Open a stack to see its files. Control-click the Desktop and choose Group Stacks By to use kind, date, or tags. Stacks group the Desktop view; they do not file documents into your Documents folders.
3. Use tags and Smart Folders for cross-cutting views. Select a file in Finder and use the Tags button to add a client or project tag. For a saved search, choose File > New Smart Folder, select a search location, and click + to add criteria such as Kind is PDF. Click Save and optionally add it to the sidebar. A Smart Folder shows matches in their existing locations; it does not move them.
4. Automate the Downloads folder. Test automation with copies of readable documents first. In OCDify, select that test folder, describe up to four categories, and choose Organize Files. Check History and try undo before selecting Downloads and enabling Auto-organize New Files. One folder at a time is free; Smart Rename and local OCR require Full Unlock.
5. Review once a week. Spend five minutes checking Uncategorized and the organizer's history, correct anything misfiled, and adjust category descriptions or rules so the same mistake does not repeat.

A folder structure you can start with

Keep active work easy to reach and put completed work in Archive. For example:

Documents/
  Finance/     invoices and receipts
  Work/        one subfolder per active project
  Personal/    household and personal documents
  Archive/     completed projects, grouped by year

This is a manual Finder example. OCDify organizes top-level files in the source folder you select; it does not recursively reorganize this folder tree.

Why Downloads is the folder that matters

Almost everything new arrives through Downloads: invoices from email, briefs from Slack, scans from your phone. It is also where generic names pile up (document (3).pdf, untitled.docx), which makes manual filing slow. Automating this one folder removes most of the work.

Step-by-step: organize your Downloads folder

Choosing an automation tool

If you can describe your filing as rules, a rules engine such as Hazel is precise. If your files are a varied mix, an AI organizer is less work to set up. If privacy matters, check where the tool analyses your documents; OCDify runs its model on your Mac and uploads nothing.

Compare the best file organizers for Mac or see how a local AI file organizer for Mac classifies documents.

Questions