fanny ☆

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Description:
Notification Center widget and menu bar application to monitor fans

Type: Cask | Latest Version: 2.3.0@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: System utilities

Tags: monitoring system-utility menu-bar notification-center hardware

Install: brew install --cask fanny

About:
Fanny is a lightweight macOS utility that provides real-time monitoring of fan speeds and internal component temperatures directly within the Notification Center or the menu bar. It offers a simple, unobtrusive way to keep track of your Mac's thermal performance, helping to prevent overheating during intensive tasks. The tool is particularly useful for users of older Intel-based Macs who want to ensure their system is adequately cooled.

Key Features:

Real-time monitoring of fan RPM and CPU/GPU temperatures
Available as both a Notification Center widget and a menu bar icon
Simple, native macOS interface with minimal system impact
Provides immediate visual feedback on system thermal status

Use Cases:

Monitoring system thermals during video rendering or gaming sessions
Verifying that cooling fans are functioning correctly on older Macs
Diagnosing potential overheating issues or unusual fan behavior

Alternatives:

iStat Menus – A comprehensive, paid system monitoring suite with extensive customization, whereas Fanny is a free, focused tool dedicated solely to fan and temperature monitoring.
Macs Fan Control – Focuses on manually controlling fan speeds, while Fanny is strictly a read-only monitoring utility.

Version History

Detected	Version	Rev	Change	Commit
Sep 12, 2022 11:05am	2.3.0	0	VERSION_BUMP	5fe1f522