How to Automate Repetitive Tasks on macOS with Shortcuts and Automator

macOS ships with two built-in automation tools — the older Automator and the newer Shortcuts (brought over from iOS) — and understanding when each is the right choice matters more than memorizing either tool’s specific interface.

Step 1: understand the practical difference between the two

Automator is older, built around chaining discrete “actions” into a linear workflow, and integrates deeply with legacy macOS technologies (AppleScript, Folder Actions, Print plugins) that Shortcuts doesn’t fully cover yet. Shortcuts is the actively-developed successor, shares automations across Mac/iPhone/iPad via iCloud, and supports more modern triggers (time of day, location, NFC tags) — but doesn’t yet have 100% feature parity with everything Automator could do.

Step 2: build a simple Shortcuts automation

Applications → Shortcuts → + (new shortcut) →
  search for and add actions (e.g., "Resize Image" →
  "Save to Photos")

Shortcuts’ action search is generally more discoverable than Automator’s categorized action library for common tasks.

Step 3: trigger a Shortcut automatically

Shortcuts → Automation tab → + → choose a trigger
  (time of day, when a specific app opens, when connected
  to specific Wi-Fi, etc.)

This is where Shortcuts clearly surpasses Automator — Automator has no equivalent built-in trigger system; its workflows generally need to be launched manually or via Calendar/Folder Actions specifically.

Step 4: build an equivalent Folder Action in Automator, where that specific integration still matters

Automator → New Document → Folder Action →
  select the folder to watch → add actions
  (e.g., "Rename Finder Items")

Folder Actions — running a workflow automatically whenever files are added to a specific folder — remain more mature and reliable in Automator than in Shortcuts as of current macOS versions.

Step 5: use Automator for a Quick Action available in Finder’s right-click menu

Automator → New Document → Quick Action →
  set "Workflow receives current" to "files or folders"
  → build the workflow → save

The saved Quick Action then appears directly in Finder’s right-click menu for any matching file type — genuinely convenient for a repeated, manual-trigger task.

Step 6: call a shell script from either tool for anything beyond built-in actions

Automator: add a "Run Shell Script" action
Shortcuts: add a "Run Shell Script" action

Both tools support dropping into shell scripting directly when a built-in action doesn’t cover what you need — this is the escape hatch for genuinely custom logic in either tool.

Step 7: convert an existing Automator workflow’s logic into Shortcuts, if migrating

There’s no automatic converter between the two — migrating a specific automation means rebuilding its logic in Shortcuts using equivalent actions, which is worth doing for anything you rely on regularly, since Automator’s long-term active development has slowed considerably in favor of Shortcuts.

Why both tools are worth knowing, rather than picking just one

Shortcuts is clearly where Apple’s active development effort goes, and is the right default choice for anything new — but Automator’s Folder Actions and certain legacy AppleScript integrations remain more capable in specific cases as of current macOS versions. Knowing which tool actually handles your specific need better, rather than committing to only one, avoids fighting the wrong tool for a job it’s genuinely weaker at.