When something goes wrong inside your Mac which causes it to send out a special warning sound but without an alert sound. Whether it’s MacBook or iMac or MacPro, you know something is going on inside when the fan goes on. The culprit? Heat. The fans are in the Mac to keep internal parts cool, but open up Safari to a dozen web pages filled with animated Flash ads, and you’ll hear the fan come on soon enough, and sometimes it’s loud. Very loud.
How can you control the fan? OS X makes the fan come on automatically depending upon specific temperatures, but the free app Macs Fan Control gives you a little more control over what goes on and when.
Here’s what it looks like.
What you get is real-time monitoring of the Mac’s fan speed and temperature sensors from the icon in the Menubar.
You also get controls to set a constant value to any Mac fan. That may help to solve some noise problems, for example, when you replace a Mac’s disk drive. Fans can also be controlled to a set speed in relation to a specific temperature sensor.
Is more control better? Not necessarily.
Macs Fan Control gives you access to options that Apple doesn’t really want you to have. The wrong setting could cause your Mac to overheat, which could cause internal parts to malfunction, so heed the developer’s warning about the app being for advanced users.