“Apple has been bundling its Mac computers with Intel processors for a while now, which means the chip-maker’s Turbo Boost technology can be found in supported Mac models,” Zayed Rehman writes for Redmond Pie. “However, Apple gives you no real control over it, which essentially means you cannot turn it on or off at will. OS X does it all automatically.”
“If you think your Mac’s fan noise is loud and if it’s generally heating up without much reason, it could be because of Turbo Boost which is at play. In this case, you may want to manually disable it for some time to see if it helps cool it down. Disabling Turbo Boost can also help increase battery life by 25%,” Rehman writes. “So if you are on the road and want an extended period of battery time out of your MacBook, disabling Turbo Boost might help you get more work done while on the go.”
Rehman writes, “Before you begin to manually enable or disable Turbo Boost on your Mac, it is important to check if the machine in question supports Turbo Boost.”
How to enable or disable Turbo Boost on your Mac here.