The first start

KaikuSDR is not signed with Apple's or Microsoft's certificates yet (a yearly cost we have left out while the product is young), so your computer treats the download as unknown. These are the clicks. Updates from inside the app are not affected.

macOS

1. Open the disk image and drag KaikuSDR to Applications, as with any app.
2. Open KaikuSDR. macOS says "KaikuSDR" Not Opened: Apple could not verify "KaikuSDR" is free of malware and offers to move it to the bin. Choose Done, not the bin.
3. Open System Settings › Privacy & Security, scroll down to Security. It says "KaikuSDR" was blocked to protect your Mac: press Open Anyway, then Open Anyway again, and give your password or Touch ID.
4. Done. It is asked once; the app opens normally from then on, updates included.

On macOS 13 and earlier, right-click the app in Applications and choose Open, then Open again.

Windows

1. Open KaikuSDR-win-Setup.exe. Windows SmartScreen says Windows protected your PC with only a Don't run button.
2. Press More info. The publisher is shown as Unknown publisher.
3. Press Run anyway.
4. Done. The app installs into your user folder, no administrator needed, and starts.

Why

Both warnings mean only that the app has not been signed with a certificate, which costs a yearly fee from Apple and from Microsoft. We will add them when the product has earned them. Everything KaikuSDR does stays on your computer: it has no account, sends no statistics, and makes no network connection of its own; a problem report goes to the developer only when you press Send. Privacy.