Lumo Copilot

Private by construction, not by promise

Most AI assistants send your conversations — and increasingly your files — to someone else's servers. Lumo makes the opposite bet: the model runs on your machine, so there's nothing to send.

✓Conversations and files never leave your Mac

✓No account, no sign-in, no telemetry

✓Works with no internet connection at all

✓Every file change and command asks you first

✓The local API is loopback-only and origin-guarded

✓Open source — read exactly what it does

What it does

A real assistant, not a chat box — it can read your files and act on your Mac, but only ever with your approval.

💬

Private chat

Talk to an open model — Gemma, Llama, Granite, Phi and more — running locally. Attach a document and it reads it directly, no upload.

⚡

Acts on your Mac

Organise folders, dig into disk usage, run commands. It shows you exactly what it will do and waits for your OK every time.

🎛️

Knows its own limits

Models are sorted by what they can actually do, and tested by hand. Lumo never claims an ability the model you picked doesn't have.

🔍

Deep Research

Ask a real question. Lumo plans searches, reads the pages it finds, and writes one answer with citations back to every source.

⚖️

Compare

Ask several of your models the same thing and read the answers side by side. Find out which one is actually good at your work.

⌨️

Coding workspace

File tree, editor, terminal, git diff and a live preview — with the assistant beside it, able to read and change the project.

🧩

Extensible (MCP)

Add tool servers over the open Model Context Protocol. You choose each one, and every call still asks permission.

📚

Projects & memory

Group related chats with shared context, notes and reference files, so the assistant keeps its bearings across sessions.

⏰

Schedules

Hand it recurring chores. It can even wake the Mac to run them, if you let it.

Getting started

About five minutes, most of it waiting for a model to download.

Download the DMG and drag Lumo to your Applications folder.
Approve it once. Double-click Lumo — macOS will refuse it the first time. Open System Settings → Privacy & Security, scroll to Security, and click Open Anyway. You only do this once.
Let it set itself up. On first run Lumo offers to install Ollama, which runs the models.
Pick a model. Lumo recommends ones that suit your Mac's memory and tells you honestly what each is good at. Gemma 4 · 12B is a solid start.
Say hello. Then try something real: what's eating my disk space?

Why the prompt? Removing it requires a paid Apple Developer certificate. Lumo is free, so macOS shows its standard warning for apps from outside the App Store. Prefer the terminal? xattr -dr com.apple.quarantine "/Applications/Lumo Copilot.app" does the same thing.