Secure Notes is a lightweight macOS app distributed outside the Mac App Store. To install:
- Download the .dmg file from the official website or release page.
- Open the .dmg and drag Secure Notes into your Applications folder.
- On first launch, macOS Gatekeeper may block the app. To bypass this, right-click the app icon and select Open, then click Open in the confirmation dialog.
- Alternatively, go to System Settings > Privacy & Security and click "Open Anyway" next to the Secure Notes entry.
Secure Notes requires macOS 13 (Ventura) or later, and runs on both Apple Silicon and Intel Macs.