Dictation in Gmail on a Mac

Gmail has no dictation feature of its own. Email is also the single highest-volume prose most people write, which makes it the best case for dictation and the place where Gmail's own writing aids get in the way.

The Gmail-specific trap: Smart Compose finishes your sentence

Smart Compose shows a predicted continuation ahead of your cursor, and Tab accepts it. Dictation pauses between phrases are exactly when the prediction appears, so a dictated draft can pick up words you never said. The result reads plausibly, which is worse than an obvious error: you skim it and send it.

1. Open Gmail settings (the gear icon, then See all settings).
2. On the General tab, set Smart Compose to "Writing suggestions off".
3. Scroll to the bottom and click Save Changes. Gmail reloads.

Turn it back on when you go back to typing. The two features are useful separately and hostile to each other.

The second trap: the send shortcut is one key away

Command+Return sends the open draft. If your dictation hotkey uses Command and you release it while the compose window has focus, the half-finished email leaves. Bind dictation to a key that does not involve Command, or dictate with the compose window in full screen so you can see the whole draft before it goes.

Dictate an email

1. Turn Dictation on once: System Settings → Keyboard → Dictation. Full steps in enable dictation on macOS.
2. Click Compose, then click into the message body. The subject line and the recipient field are separate fields, and no spoken command moves between them. Fill those by keyboard.
3. Start Dictation and speak the body in one pass. Say "comma", "period", and "new paragraph".
4. Stop Dictation. Gmail autosaves the draft continuously, so nothing is lost if you walk away.
5. Read it back, then send.

If dictation drops out mid-reply

• Gmail runs in a browser, so the browser holds the microphone permission: System Settings → Privacy & Security → Microphone.
• Clicking a different Gmail conversation while dictating moves focus out of the compose box. Dictated text after that point goes to Gmail's single-key shortcuts instead, which archive and label messages.
• Dictation dead everywhere, not just Gmail: dictation not working on Mac.

A hotkey that does not fight the compose window

Voice Type inserts the finished text on release rather than streaming keystrokes, so Smart Compose has no pause to predict into and no partial word to complete. The model runs on your Mac, which matters when the draft is a client email: voice typing for Mac.

Keep going

• Dictation in Google Docs (two engines, and which browsers support each)
• Dictation in Slack (Return sends, and how to turn that off)

Sources

• Gmail Help: Write emails faster with Smart Compose
• Gmail Help: Keyboard shortcuts for Gmail
• Apple: Dictate messages and documents on Mac