FastAndSlow 1.3 for Mac was free to download from our software library. This free Mac app is an intellectual property of GTSystem Software. FastAndSlow for Mac relates to System Tools.
From the developer:
FastAndSlow is a MenuExtra addition that adds the ability to switch the Powerbook/iBook CPU/iMac G5 processor performance (in the Energy Saver settings) from the menubar.
You can select between "fast" , "slow" and "Automatic" (if your computer supports this setting). It is useful for example when your Mac becomes too hot and the fan starts. Using the slow setting it doesn't happen and will reduce battery consumption.
You may want to check out more software for Mac, such as InsomniaT or IBM Performance Analysis Suite, which might be similar to FastAndSlow.