Hold a speed
Move the slider and Zephyr keeps that speed until you change it.
Zephyr
Let your Mac
run cooler.
Hold the fan from the menu bar. See the heat, keep a speed, and hand it back to macOS when you are done.
US$4.99 once. No subscription.
ZephyrApple M5 ProAutomatic66°Warm
- CPU66°
- GPU60°
- Memory54°
- Storage48°
- Battery42°
Fan speed
1,2006,000
Fan 12,832 rpm
Fan 22,428 rpm
Very limited demo version. Simulated readings; this demo does not read or control your Mac.
The panel
Everything lives in one place.
Hand it back
Automatic returns the fan to macOS in one click.
Your readings
Standard groups CPU, GPU, memory, storage and battery readings. Advanced includes other available sensors, search, SMC/HID sources and session minimums and maximums. Both modes are included.
Pin a temperature
Keep the hottest reading, a group or a specific sensor at the top of the panel and in the menu bar. Health, Heat and your custom scales remain available.
Menu bar
No Dock icon. It can open when you log in. Temperature, status, and manual or automatic can sit beside the icon.
- Fan
- Thermometer
- Wind
- None
Light, dark, or glass
The panel can be light or dark, solid or glass.
Frequently Asked Questions
Will Zephyr run on my Mac?
Zephyr is built for Apple silicon and Intel Macs with macOS 13 or later. Available readings and fan control depend on your hardware and macOS. Fanless Macs have no fan to control. Support for every sensor on every Mac is not guaranteed.
Does it add a Dock icon?
No. Zephyr stays in the menu bar.
Can it open when I log in?
Yes. Open at login is a switch in the panel.
Is US$4.99 a subscription?
No. It is one payment. There is no renewal.
How do I activate or transfer Zephyr?
Buy without creating an account. Verify your checkout email in Settings → Account to activate one Mac. Recover your purchases and deactivate a previous Mac at My purchases. A valid perpetual activation works offline; changes to an offline Mac take effect when it reconnects.
What does Automatic do?
It returns fan control to macOS. Move the slider when you want to hold a speed yourself.
Can I change the words?
Health reads the heat as Calm, Healthy, Warm, Strained, or Critical. Heat reads it as Cool, Mild, Warm, Hot, Very hot, or Critical. Custom uses words you write.
Can I get a refund?
Within 14 days of the receipt, if you have not installed Zephyr, or if it will not run on a supported Mac and we cannot fix that.
Keep your Mac this cool.
Get Zephyr for MacUS$4.99 once. No subscription.