A macOS menu bar app that puts you back in charge of your fans.

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brew tap hoobnn/tap
brew install --cask fanfan

Download the latest DMG from Releases, or run the install script:

curl -fsSL https://raw.githubusercontent.com/hoobnn/fanfan/main/scripts/install.sh | bash

Requires macOS 26+ (Apple Silicon or Intel). One password prompt on first launch — that's it.

Writing fan speeds requires root. Instead of running the whole app as root, fanfan installs a tiny C LaunchDaemon that owns the SMC handle and accepts exactly three commands over a Unix socket: PING, SET, AUTO.

fanfan.app  ──unix socket──▶  fanfan-smcd (root)  ──IOKit──▶  SMC

The app itself runs unprivileged. Temperature reads go straight through IOKit.

Forked from solofan. Thanks to the solofan team.

MIT © 2026 hoobnn