1778 Views 2 Replies Latest reply: Mar 31, 2011 9:54 PM by jmljunior
Try doing a SMC reset. If that doesn't take care of it and your machine is covered by warranty or AppleCare then make an appointment at your local Apple Store.
• Shut down the computer.
• Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
• On the built-in keyboard, press the (left side) Shift-Control-• Option keys and the power button at the same time.
• Release all the keys and the power button at the same time.
• Press the power button to turn on the computer.
I have a similar problem with the fan in my 13" macbook pro. When it is spinning at its lowest speed I hear a horrible rattling. If I hold the macbook at any other angle (even upside down!) the rattling stops, and the fan is whisper quiet like it was when I first bought the computer.
Until I replace the fan, I downloaded a fan speed control app, and am running the default speed at a slightly higher RPM (2800 instead of 2000).
This stops the fan noise/rattling for me.