Troubleshooting Mac Pro - Teach Yourself Visually Complete Mac Pro - page 819

Force a Stuck Process to Close
A process is a running instance of an executable program or an execution thread within a
program. All the applications you have running are processes, but so are all the behind-the-
scenes programs that Mac Pro and your applications require to function properly. If Mac Pro
is running very slowly or is using all of its CPU resources (see Chapter 16 ) but the Force Quit
command does not show a stuck application, then a stuck process may be at fault. You can
use Activity Monitor to check this and to force a stuck process to close.
Force a Stuck Process to Close
Click Spotlight ( ).
Type activity .
Click Activity Monitor .
The Activity Monitor window appears.