Can Mac Live Captions Work Offline? Permissions, Privacy, and Local Processing
Understand when Mac live captions need the internet, why system-audio permission appears, and how local processing changes the privacy picture.
2026-08-10 · 9 minThe short answer: setup may need internet, daily captioning can run locally
Mac live captions can use local recognition and translation after the required Apple language resources or a local Whisper model are installed. The first setup may need an internet connection to download those resources. Once they are available, capture, recognition, and translation can run on the Mac for supported workflows rather than sending every piece of audio to a remote service.
Why the first language-resource download matters
Language support is not only a switch in the interface. macOS and local models need speech and translation resources that take storage and may differ by language, region, and system version. Download the languages you actually plan to use, then test a short video or meeting before relying on captions for a long session.
Why macOS asks for Screen & System Audio Recording permission
A microphone permission would capture sound around the Mac, but system-audio captioning needs access to the digital playback produced by apps. macOS groups that capability under Screen & System Audio Recording. The permission allows the app to receive playback audio; it does not mean the app needs to save screen frames or raw audio. Review the macOS permission panel and only approve apps you trust.
What local-first processing means for privacy
Local processing keeps recognition and translation work on the Mac after the required resources are ready. Alison Workspace does not save raw audio, and text history stays on the Mac until you delete it. Local processing is not a promise that every surrounding app is private, however: the meeting service, browser, video provider, and other software still have their own data policies.
When an internet connection can still be useful
You may need internet access for the initial resource or model download, app updates, help pages, or an online service that is separate from caption generation. Network availability can also affect the video or meeting itself. If you are preparing for travel or a sensitive meeting, install resources and run a short offline test beforehand.
Troubleshoot captions without weakening your privacy settings
If captions do not appear, confirm that the correct input language is selected, the required resource is installed, and macOS still shows the system-audio permission as allowed. Check that the source app is actually playing audio and that protected content is not blocking capture. Avoid granting unrelated permissions just to make a caption bar appear.
Frequently Asked Questions
Do Mac live captions need the internet every time?
Not necessarily. The initial language-resource or model download may need internet, while supported recognition and translation can run locally after setup.
Does system-audio permission mean my screen is recorded?
The permission provides access to playback audio for capture. Alison's product behavior does not save screen frames or raw audio, but you should review permissions and the privacy policy for the exact release.
Is local processing the same as complete privacy?
No. Local processing describes where Alison's recognition and translation run. The browser, meeting service, video provider, and other apps may have separate data practices.
What should I test before an offline meeting?
Install the needed resources, enable the required permission, play a short sample from the same type of app, and confirm that captions and the selected languages work before the meeting begins.