AirStats
A low-overhead menu bar monitor for CPU, memory, GPU, network, disk, battery and temperatures.GetMIT
Mystral
Menu bar app that shows temperatures and fan speeds and runs custom fan curves on Apple silicon Macs.
MIT · Free download · Downloads from github.com
- License
- MIT
- Open source
- Source
- GitHub
- fexxdev
- Verified
- 2026
About Mystral
Mystral is a menu bar app for Apple silicon Macs that reads temperatures and fan speeds and lets you set fan curves. It has a live dashboard of recent CPU and GPU temperatures, a curve editor with per-fan overrides, and profiles such as Silent, Balanced, Performance and Full Blast that can switch by power source or frontmost app. Alerts cover high temperatures and fans that stop responding, and a 30-second stress test checks that the curve reacts. It suits people who want fans quieter or louder than macOS's automatic behaviour.
Requires macOS 14 or later on an M1 to M5 Mac. The v1.1.5 DMG is ad-hoc signed and not notarized, so the first launch needs right-click › Open. Fan control runs through a root-owned launchd helper that asks for your password at install. The README says the fan unlock works by bypassing macOS's thermal daemon, so watch temperatures when you set custom curves. The built-in updater accepts only strictly code-signed release DMGs.
Information
- Source code
- fexxdev/Mystral
- License
- MIT
- Website
- github.com
- Download
- github.com
- Category
- Utilities
- Alternative to
- Macs Fan Control
- Topics
- Menu bar apps
- Evidence checked
- Tags
OpenMacApps links to each project’s official download. Check its release notes for macOS version and Apple silicon support. The verification date records our license and source review, not a security audit. Read how we verify.
Sources and image credits
- github.com/fexxdev/Mystral
- github.com/fexxdev/Mystral/blob/main/LICENSE
- github.com/fexxdev/Mystral/releases
- icon.png: Mystral contributors. MIT; upstream app icon, trademarks retained.
License and artwork notices
For the Developer
Link to this page from your README with a badge.
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