echo 1 > /sys/devices/platform/applesmc.768/fan1_manual
echo 4000 > /sys/devices/platform/applesmc.768/fan1_output

echo 1 > /sys/devices/platform/applesmc.768/fan2_manual
echo 4000 > /sys/devices/platform/applesmc.768/fan2_output

echo "Setting Fans Speed to 4000RPM!"