to commonly asked questions.

Adjusting your screensaver and sleep times

the fan is running. I took a screen shot. What do I do?
Screen Shot 2014-02-02 at 11.37.22 AM

According to the great screenshot you took, no processes seem to be running that would cause a heavy cpu load to heat the processor to the point that the fan would need to activate. So it’s a mystery at the moment. You could sort within the memory tab as well although even if you had a memory hog application that does not generally cause fan craziness. If it’s driving your crazy that the fan is running but haven’t noticed a performance issue, you do have an option. You could download a little preference pane called HDD fan control. It could be a bad temperature sensor. This program allows you to set the starting temperature range differently. It’s a few dollars but could keep the fans running by increasing the temperature tolerance level. Check it out here.

If, however, you are noticing significant performance degradation when the fans come on, then this won’t help. There’s something else taking over. But given the screen shot you took, there’s no evidence of that.
This image is a theme.plist hack