CoolBook is a tool for the MacBook, MacBook Air and MacBook Pro computers. It lets you monitor the frequency, voltage and temperature of the CoreDuo / Core2Duo CPU.

CoolBook does not work with OS X 10.7 Lion or later. i3/i5/i7 CPUs are not supported.


Registered users can also change the frequency and voltage of the processor. Download CoolBook to find out more.

 Reduce heat
 Reduce fan noise
 Extend battery life
 Improve performance
 Fine tune your  CPU
Purchase a license

The price for the license is $10 USD (+25% VAT in the EU) for one unique computer. Download and install CoolBook before you buy the license to confirm that it works with your Mac model. You need an internet connection to activate the license. 

By clicking "Buy Now" you agree to the terms listed under "Purchasing a license” in the manual.