Fastest: paste one command into Terminal and press Enter. Lumio installs and opens with no warnings.
curl -fsSL https://lumiomac.com/install.sh | shOr open the downloaded app by hand — only once:
- Drag Lumio into Applications.
- Open it. When macOS stops it, click Done — not “Move to Trash”.
- Open System Settings → Privacy & Security, scroll down and click Open Anyway.
- Click Open Anyway once more and confirm with your password or Touch ID. macOS won’t ask again.
Why does this happen? Lumio is a free app from independent developers, and we haven’t had it notarized by Apple yet.