The first thing to note is that there may be two possible things causing this problem on a Mac laptop:

• Your aux fan may not be functioning normal anymore.
• Your Processor or your Video Card is working so much that it spikes up the heat in your hardware.

Solution 1: Bring it your your nearest Apple Center. It’s common sense suggestion but I find that not everyone takes this route right away thinking it is a hassle. Well, it’s not. Most especially if your service center has the best people around. I would suggests bringing your Mac to Senco Phil (Philippine residence only). The assistance they provide is exceptional, first-class service. It’s all worth going to their offices to have your unit checked.

If your unit is still under warranty, then you have it so much better. Parts like the aux fan, by the way,  are covered when you first get your Mac.

Solution 2: Your best option for this kind of problem is  doing the tweaks yourself. Make your aux fan run at higher speed. Most come with a default setting, and that’s not enough.  So, here are two applications I would recommend you use.

Fan Control – The fan control will adjust the fan speed depending on your CPU’s temperature. The original automatic  fan speed control though is kept intact.

smcFanControl – This is great for every Intel Mac and will help it cool down. You set the minimum speed yourself.

I’ve been using these applications for years now and have benefitted a lot from it.