Not a Fan

Not a Fan is a macOS menu bar app that monitors your CPU temperature and fan state, and notifies you when your CPU is being throttled because of excessive heat.

Works on Intel and Apple Silicon (M1/M2/M3/M4…) Macs as of v1.0.0 — sensor reads go through go-smc, which now supports both architectures. Fanless Macs (MacBook Air, Mac mini base, Mac Studio) show "No fans!" — they have no fans to read.

Install

• Download the app
• Unzip it
• Put it in Applications
• Run it
• To run every time you log in, select "Start at login" from the menu bar

Screenshots

Built with

• Menuet — build menu bar apps in Go
• go-smc — read your Mac's temperature and fan speed (Intel + Apple Silicon)
• go-pmset — subscribe to changes in your Mac's temperature and throttling state

License

MIT