10. Run a "Classic" Application  BEFORE YOU BEGIN 1 Install an Application from Disc or Download
Most Mac applications are designed to run "natively" in Mac OS X, meaning that they are programmed specifically for the architecture of the Mac OS X operating system. However, some older applications are still in use that were designed to be run on Mac OS 9 or earlier versions, and are therefore very different from Mac OS X applications in a number of key ways. You can run these so-called "Classic" applications only within an environment called Classic (which is, in effect, a copy of Mac OS 9 running inside Mac OS X). If you launch a Classic application, the Classic environment launches automatically, and from then on you can use the application just as you would any other, but you can also launch the Classic environment separately, for instance if you want to save time by launching it at the beginning of your session so that Classic applications can later be launched quickly. | 1. | Open Classic Preferences
Open the System Preferences (select it from the Apple menu) and open the Classic pane.
| | 2. | Select a System Folder
Most installations of Mac OS X have a single System Folder (the folder containing the complete Mac OS 9 system that comprises the Classic environment). If you have multiple copies of the operating system installed, however, you must select which one to use for Classic. Select a disk or volume (and expand it using the triangular arrow), and select the System Folder corresponding to the installation of Mac OS 9 that you want to use.
| | 3. | Start the Classic Environment Click the Start button to launch the Classic environment. Classic starts up in a window you can expand to show the boot procedure of a Mac OS 9 computer (the one that's effectively being booted from within your Mac OS X system). 10. Run a "Classic" Application   NOTE If you receive a notification that Mac OS X must update some files in the Classic environment before proceeding, allow the OS to do so; this is expected behavior for new installations. | | 4. | Launch the Application Open the Mac OS X Finder by clicking the familiar Finder icon in the Dock, and navigate to the application you want to run. Double-click the application icon as you would any application in Mac OS X to start the Classic application. TIPS Applications for Mac OS 9 can be found in the global Applications (Mac OS 9) folder. You can navigate to this folder using the standard Mac OS X Finder. A Classic application can often be identified by the way its icon looks. Mac OS 9 supported icons only up to 32x32 pixels in size (Mac OS X icons can be 128x128 pixels and can incorporate 24-bit color with transparency.) Thus, a Classic application's icon might look blocky or drab. | | 5. | Stop the Classic Environment
After you quit the Classic application, it's a good idea to shut down the Classic environment as well, because the environment takes up resources you might need for other tasks . Repeat step 1 to open the Classic Preferences dialog box again and click the Stop button to shut down the Classic environment.
| NOTE If you stop the Classic environment while there are still Classic applications running, the applications are shut down. Be sure to quit your Classic applications cleanly, just as you would before shutting down the computer altogether!
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