KaikuSDR
Download
One download for Free and Full. Every copy is the free version until a licence is entered.
Free, no account, no time limit.
macOS
KaikuSDR 2026.10.3, released October 2026.
A disk image: open it and drag KaikuSDR to Applications.
Apple silicon (M1 and later). Needs macOS 14 or newer. Tested on macOS 27.
Windows
KaikuSDR 2026.10.3, released October 2026.
An installer. It keeps the app up to date when you ask it to.
Windows 10 or 11, 64-bit. Tested on Windows 11.
What your computer will say
KaikuSDR is not yet signed with Apple's or Microsoft's certificates. So the first start takes a few more clicks.
macOS says the developer cannot be verified. Windows says it protected your PC. What to click.
Updates from inside the app are not affected.
What your receiver needs
- RTL-SDR dongles work through rtl_tcp, a small program the app starts for you. On a Mac, Homebrew's
librtlsdr. On Windows, the WinUSB driver (Zadig), and the app fetches rtl_tcp.exe itself. Step by step. - Airspy R2 and Mini need libairspy: Homebrew on a Mac, the Airspy driver on Windows.
- Other receivers come as they are checked on real hardware. What's new says when.
Every version
A licence covers every version released up to and including the month its year ends in.
Older versions stay here, so that you can always fetch one your licence covers.
| Version | Released | For | Download |
|---|---|---|---|
| 2026.10.3 | October 2026 | macOS (Apple silicon) | disk image |
| 2026.10.3 | October 2026 | Windows x64 | installer |
What changed in each: what's new.