At present there are many "hardware monitoring" class applications, you can keep abreast of the operation of the equipment. But if we just want to know about CPU usage, network usage and other information, small weave here to tell us how to use the Mac system with the tools implemented in the dock bar real-time monitoring display CPU usage.
First, open the Activity monitor, for easy viewing later, right-click the icon in the Dock bar and choose option-Keep in dock. Then select Monitor-Show CPU usage, and a small window appears, displaying the CPU usage graphically.
But jumping out of a window like this is really easy to see, but the icon is too abrupt and not so beautiful. So the point is, we still right click on the icon, select "Dock icon-show CPU usage" so that we can select the Display icon we need.
All the effects shown are as follows and you can also choose other effects