Mac OS X is another example of a multitasking operating system in which you can run several applications at the same time. This project enables you to start three applications in Mac OS X Leopard or Snow Leopard to demonstrate multitasking.
To multitask in Mac OS X:
1. Double-click Macintosh HD on the desktop.
2. Double-click the Applications folder.
3. Double-click TextEdit. What happens to the Dock when you start this program?
4. Click the Applications window to bring it to the front and double-click Calculator. How is the Dock changed? Record your observations.
5. Click the Applications window and double-click Address Book. (Note that in many cases you can also start Address Book from the Dock because it typically has an Address Book icon in the default setup.)
6. Click the Applications window to activate it and so that Go is displayed as an option in the menu bar at the top of the screen. Next, click Go in the menu bar and click Utilities.
7. Double-click Activity Monitor in the Utilities window.
8. Make sure that CPU is selected in the lower portion of the Activity Monitor window. Click the % CPU column header to sort programs by activity. Notice the changes (or lack of changes) in the CPU activity as you close windows in the following steps. (If necessary, move or maximize the Activity Monitor window so that it is not obscured by other windows as they are clicked.)
9. Click the Utilities window and close it.
10. Click the Calculator on the desktop or its icon in the Dock to bring it to the front. Click Calculator in the menu bar at the top of the desktop and click Quit Calculator.
11. Click the Address Book window (or icon in the Dock). Click Address Book in the menu bar at the top of the desktop and click Quit Address Book.
12. Click the TextEdit window (or icon in the Dock). Click TextEdit in the menu bar and click Quit TextEdit.
13. Click the Activity Monitor window (or icon in the Dock). Click Activity Monitor in the menu bar and click Quit Activity Monitor.
14. How has the Dock now changed?
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