Real-Time Translation on Mac: Live AI Subtitles for Any Audio (2026 Guide)

TL;DR: StreamVox puts live, translated subtitles on your Mac for whatever audio it's playing - a Zoom call, a FaceTime chat, a Netflix show in another language, a game. It works on macOS 14.2 Sonoma or newer, on Apple Silicon and Intel, and translates from 49+ languages. Download it free from the Mac App Store, pick your languages, and subtitles start appearing over any app within a minute.

StreamVox for Mac is a real-time AI subtitle and translation app. It captures audio your Mac is already playing - system-wide or from one specific app - runs it through speech recognition and translation, and shows the result as live subtitles in a floating overlay on top of whatever you're watching or talking through. As of July 2026, it's the same engine that already runs on Windows, now native to macOS.

How Do Live AI Subtitles Work on a Mac?

StreamVox listens to audio your Mac produces, not audio it records from the room. You choose the source: capture everything the system outputs, or isolate a single app with per-app audio capture so a call, a stream, or a game gets translated without notifications and background music mixing in.

That audio is converted to text and translated, and the result appears in a floating subtitle window that sits on top of any app - a browser, a video player, a call window, a game in fullscreen. There's also a teleprompter overlay mode, which displays translated text in a larger, more readable strip if you'd rather have subtitles read like a script than a caption bar.

Because the overlay floats above everything, you don't need the source app to support subtitles at all. If your Mac can play the audio, StreamVox can translate it.

How to Set Up Real-Time Translation on macOS (3 Steps)

Getting live subtitles running takes about a minute:

Download StreamVox from the Mac App Store and sign in. It's free to install, and the free plan gives you about 15 minutes of translation per day to try it out.
Pick your audio source and languages. Choose system audio or a specific app, then set your input language (what you'll hear) and output language (what you want to read) from 49+ supported languages.
Turn on the overlay. Position the subtitle window - or switch to teleprompter mode - anywhere on your screen, and it stays pinned there while you use whatever app you're translating.

That's the whole setup. No extra drivers, no virtual audio routing, no browser extensions.

What Can You Translate on a Mac?

StreamVox doesn't care which app made the sound - if it plays through your Mac, StreamVox can subtitle it. That covers:

Video calls - Zoom, Microsoft Teams, Google Meet, Skype, Discord, and FaceTime
Streaming and video - YouTube, Netflix, Twitch, in Safari or any other browser or player
Games - understand voice chat or in-game dialogue in another language
Phone calls you answer on your Mac - if your iPhone shares the same Apple ID and Wi-Fi network as your Mac, Apple's Continuity feature lets an incoming call ring on both devices. Answer it on the Mac, and StreamVox subtitles the call like any other audio. Android calls routed through a Mac aren't available; that remains a Windows-only capability.

StreamVox also has a Conversation mode for live, two-way interpreting: two people speak in any of 10 supported languages, and each side reads the other's speech translated automatically, with speaker detection handling who said what.

Can It Speak the Translation Aloud?

Yes. Text-to-speech is in Beta and free on every plan, including the free tier. Instead of just reading subtitles, StreamVox can speak the translated text out loud.

On macOS, TTS uses the voices already installed on your Mac - about 40 languages, depending on which voices your system has. The default built-in voices can sound flat or robotic. For noticeably more natural speech, download enhanced voices through macOS System Settings; StreamVox shows you a tip on how to do this the first time you turn TTS on.

Does One Subscription Cover Windows and Mac?

Yes. StreamVox has four plans: Free (about 15 minutes of translation per day), Pro at $8.99/month (40 hours), Pro+ at $14.99/month (70 hours), and Unlimited at $24.99/month.

Whichever plan you subscribe to, one subscription works on both Windows and Mac - it doesn't matter whether you bought it through the App Store, the Microsoft Store, or directly on the web via Paddle. The app runs on one device at a time, so if you want to switch from your Mac to your Windows PC (or back), close or sign out on the first device and sign in on the other.

What Does StreamVox Need on a Mac?

macOS 14.2 Sonoma or newer
Apple Silicon or Intel - both are fully supported
An internet connection - speech recognition and translation run through trusted third-party AI processors, not on the Mac itself

On the privacy side: your audio is processed transiently, in real time, purely to generate the subtitles or spoken translation on screen. It is not stored. The AI processors that handle recognition and translation work under data-processing agreements that require them to use the audio only to return your result, and they're contractually barred from retaining it.

Frequently Asked Questions

Does StreamVox work on Apple Silicon and Intel Macs?

Yes. StreamVox runs on both Apple Silicon and Intel Macs, as long as you're on macOS 14.2 Sonoma or newer.

Does StreamVox work with phone calls on a Mac?

It can subtitle the calls you answer on your Mac. If your iPhone is signed in with the same Apple ID and on the same Wi-Fi network, Apple's Continuity feature lets an incoming call ring on your Mac - answer it there and StreamVox translates the audio live. Android calls routed to a Mac aren't currently supported.

Does StreamVox read translations aloud on Mac?

Yes, with the free text-to-speech (Beta) feature available on every plan. On macOS it uses the voices already installed on your Mac, covering roughly 40 languages. The built-in voices can sound robotic; download enhanced voices in System Settings for more natural speech.

Do I need a separate subscription for macOS if I already use StreamVox on Windows?

No. One StreamVox subscription works on both Windows and Mac, no matter where you bought it - the App Store, the Microsoft Store, or the website. The app runs on one device at a time, so sign out on one to use the other.

Is my audio recorded or stored when I use StreamVox on Mac?

No. Audio is processed transiently, in real time, to generate your subtitles, and it is not stored. Speech recognition and translation run through trusted third-party AI processors under data-processing agreements that prohibit them from retaining your audio.

How to Get Started on Your Mac

Download StreamVox free from the Mac App Store.
Sign in with your account (or create one in the app).
Pick your input and output languages from 49+ options.
Subscribe inside the app if you need more than the free plan's 15 minutes a day - Pro, Pro+, and Unlimited all unlock the same features, just with more hours.

The language barrier on your Mac isn't a hardware problem or a missing subtitle track - it's a translation layer you haven't turned on yet. Download StreamVox, point it at whatever you're watching or talking through, and let the overlay do the rest.

AlekGir