Legal
Terms
Last updated 12 July 2026
The short version
Zephyr is a native macOS utility that leads your Mac’s fan curve to run it cooler and quieter. It is provided as-is, and by installing or using it you accept these terms.
Thermal safety
Zephyr applies a temperature offset and leads the operating system’s fan curve. It does not disable Apple’s built-in thermal protection, and it fails closed: control returns to macOS automatically if Zephyr stops, your Mac sleeps, or the system reports a thermal event. Even so, it is a low-level system utility — run it on hardware you are comfortable managing.
Requirements
Zephyr supports Apple Silicon Macs (M-series) on macOS 14 or later. It is distributed outside the Mac App Store — signed with a Developer ID and notarized by Apple — because the App Store sandbox blocks the hardware access that fan control requires.
No warranty
To the fullest extent permitted by law, Zephyr is provided without warranties of any kind, and its authors are not liable for any damages arising from its use.
Contact
Questions about these terms? Email legal@zephyr.app.