This may help investigations ..
In Windows the task manager (Ctrl+ALt+del) > processes shows you the CPU usage by process my idle comes in at around 25% in Vista
As for Macs Click on the "Applications" icon in the a Mac "Finder" window and scroll down to the "Utilities" folder and select "Activity Monitor." Double-click "Activity Monitor" to launch the application.
Read more: How to View Running Processes on Mac OS X | eHow.com http://www.ehow.com/how_4799610_running-processes-mac-os-x.html#i xzz1jmkhRX2i
In Windows the task manager (Ctrl+ALt+del) > processes shows you the CPU usage by process my idle comes in at around 25% in Vista
As for Macs Click on the "Applications" icon in the a Mac "Finder" window and scroll down to the "Utilities" folder and select "Activity Monitor." Double-click "Activity Monitor" to launch the application.
Read more: How to View Running Processes on Mac OS X | eHow.com http://www.ehow.com/how_4799610_running-processes-mac-os-x.html#i xzz1jmkhRX2i