CoolBook
 
CoolBook is a tool for the MacBook and MacBook Pro computers. It lets you monitor the frequency, voltage and temperature of the CoreDuo / Core2Duo CPU.
 
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
CoolBook © 2009 Magnus Lundholm
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.