Best folder automation apps for Mac

For broad "watch a folder and do anything" automation, Hazel and Keyboard Maestro are the most powerful. For the specific job of "a file lands in this folder, email it to these people", AutoMailSender does that with no scripting — free for 25 emails, then a one-time €9.99. Automator's Folder Actions are free and native if you're happy to tinker.

General power vs one focused job

Folder automation splits into two camps. Some tools are general engines — they can rename, sort, tag, run scripts, and do almost anything when a file appears. Others are focused: they nail one workflow end to end. Here's the honest split.

How each one stacks up

Hazel — The reference tool for folder automation on the Mac, and it earns it. It watches folders and applies rules: move, rename, sort, tag, run a script. Its breadth is the selling point. Emailing a file is possible but usually means adding a script or handoff, so it's more of a build-it-yourself step than a feature. If you want one tool to keep your whole file system in order, Hazel is hard to beat.

Automator / Folder Actions — Free and built into macOS. Attach a Folder Action to a folder and a workflow runs when files arrive. It's genuinely capable across many tasks, and you can route a file into Mail — but the email path takes assembly and can be brittle. Best if spending nothing and staying native matter more than convenience.

AutoMailSender — Not a general automation engine, and doesn't pretend to be. It does one folder workflow completely: point it at a watched folder, set the recipients once, and every file that lands there is emailed to those people automatically — no scripting, no compose window. Native macOS (macOS 14+, ~1.7 MB), sends over your own SMTP (Gmail, Outlook / Office 365, iCloud, Yahoo, custom) with TLS and Keychain-stored credentials. If "watched folder → email" is the exact thing you want, it's the shortest path; if you want to rename and sort files too, pair it with Hazel.

Keyboard Maestro — A paid, very powerful macro tool that reaches well beyond folders: keyboard triggers, app control, text expansion, and folder triggers among them. It can email a file via a macro. The trade-off is a real learning curve — it's a Swiss-army knife, so simple jobs take more setup than a focused tool.

Which should you pick?

Pick Hazel or Keyboard Maestro if you want broad automation across many file tasks and don't mind some setup. Pick Automator if free and native wins and you enjoy tinkering. Pick AutoMailSender if the specific goal is "drop a file in a folder, it gets emailed to the same people" and you'd rather not script anything at all.