Control access to speech recognition on Mac
Some apps and websites can access speech recognition on your Mac, which sends recorded voice to Apple to process your requests. You can decide which apps are allowed to use speech recognition.
On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click Privacy.
Select Speech Recognition.
Select the checkbox next to an app to allow it to access speech recognition.
Deselect the checkbox to turn off access for that app.
If you allow third-party apps or websites to use speech recognition, any information they collect is governed by their terms and privacy policies. It’s recommended that you learn about the privacy practices of those parties.
For systems administrators who want information about deploying security settings, see the macOS Deployment Reference.