How to use AI offline on your Mac

Here's the test that settles it. Open whatever AI app you use, turn on Airplane Mode, and ask it anything. If it spins and then apologizes, it was never AI on your Mac. It was a webpage pointed at a data center, and you were the thin client the whole time. Real offline AI passes the airplane test: the model is sitting in a folder on your disk, the math runs on your own chip, and it answers with the radio off. This is how you set that up.

Why most AI needs the internet

The big assistants don't run on your computer. ChatGPT, and most chat apps wrapped around it, are clients: you type, the text travels to a server farm, a model you never touch produces a reply, and it travels back. The intelligence lives in someone else's building. That's why a dropped connection breaks it, why there are usage caps, and why "is the model down?" is a question that exists at all. Your device is doing roughly as much thinking as a TV remote.

Local AI flips the arrangement. The model (the actual file of weights) gets downloaded to your Mac once, and after that the work happens on your Apple Silicon chip. No request leaves the machine. The internet was only ever the delivery truck; once the model is parked in your garage, you don't need the truck again. Open-weight models (the kind published openly, like the ones on HuggingFace) make this possible because the weights are yours to keep, not a service you ping.

The offline setup (four steps)

No terminal, no Docker, no account. On an Apple Silicon Mac (M1 or newer, macOS 12+):

1. Download the signed app, once. Grab Outlier: one notarized .dmg from the site, drag it to Applications. This is the only thing that needs the internet, and only this once.
2. Pick a model and let it land on your disk. Open the app and choose a tier. Nano and Lite are free and small; they download to a folder on your Mac and stay there. Bigger tiers exist if you want them, but you don't need the cloud to use what you've downloaded.
3. Ask one question while still online, just to confirm the model loaded and you're getting answers. Nothing's offline yet; you're checking the engine turns over.
4. Cut the cord. Turn Wi-Fi off (or flip on Airplane Mode), then keep chatting. The answers come from the model already on your disk, computed on your chip. No reconnect, no "you're offline" wall.

That's the whole thing. The reason it works is unglamorous: a model is a file, your chip can do the arithmetic, and a file doesn't need a signal.

How to verify it's really offline

Don't take anyone's word for it, including ours. There's a hardware-level proof you can run in ten seconds, and it's the same test that exposes the fakes.

• Flip on Airplane Mode. Menu bar → turn Wi-Fi off, and disable Bluetooth too if you want to be strict. The Mac is now an island.
• Ask something fresh. Pose a new question you haven't asked before, so there's no cached answer to lean on.
• Watch it answer anyway. The reply streams in with the radio off. If you want to be thorough, open Activity Monitor's Network tab while you ask: a truly local model sends nothing.

Run the same test on a cloud app and it fails immediately, which is the point. Offline isn't a setting you trust; it's a thing you can see. Outlier runs with Wi-Fi off because the model is genuinely on your machine, not as a feature toggle, but because there's nowhere else for the work to happen.

What changes when you're offline (and what doesn't)

Being honest about the trade keeps this trustworthy. Offline, two things change. Anything that needs live data (today's news, a current stock price, a fresh web search) isn't there, because there's no web to reach; the model answers from what it learned, not from the internet. And speed depends on your chip: a heavy local model like Core 27B runs about 20.7 tok/s on an M1 Ultra where cloud flagships run 80–100, so big models feel deliberate rather than instant.

What doesn't change is everything that matters for getting work done. Writing, editing, coding, summarizing a document you already have, reasoning through a problem, drafting an email: all of it runs the same with the radio off. And the privacy isn't a promise, it's physics. With Wi-Fi off, your prompts can't go anywhere because there's no server to send them to. No usage cap, no queue, no "you've hit your limit." The same model is sitting there on a flight at 36,000 feet, in a windowless room where nothing's allowed online, or in the dead zone where your bars vanish. The marginal cost of an offline answer is your wall socket: no data center required.

Frequently asked questions