How do I control my Mac's fan speed with Notchy?
Turn on “Fan Control (Beta)” in Settings → Battery & Fans → Fans. It runs through Notchy's background helper, which asks for your administrator password once. Then set each fan to Auto, Manual (a fixed speed) or Curve (speed follows temperature).
Step by step
- Open Settings → Battery & Fans and switch on “Fan Control (Beta)”.
- Install the Background Helper when asked and enter your administrator password.
- For each fan, choose a Mode — Auto, Manual or Curve — and set the speed.
- “All Fans Automatic” hands every fan back to your Mac at any time.
Good to know
Your Mac's own thermal protection always stays on. A speed you set is a floor: macOS can still spin the fan faster, and Notchy never sets a speed outside the fan's own minimum and maximum.
If the Mac reaches 95 °C, Notchy hands the fans back to the firmware until it cools down, whatever you set.
Some Macs' firmware doesn't allow setting fan speeds; Settings says so on those Macs.
The same helper powers the battery charge limit. “Remove Charge Helper” under Charge Limit removes it.
See also
Updated
Didn't solve it?
Ask a follow-up, or email the developer directly.