Mac OS X 10.4 Help
About using Mac OS 9 applications in Mac OS X
If you need to use Mac OS 9 applications, you can do so in the Classic environment in Mac OS X. To use the Classic environment, you must have a Mac OS 9 System Folder installed on your computer, either on the same hard disk as Mac OS X, or on another disk or disk partition.
The Classic environment requires Mac OS 9.1 or later. If you are using an earlier version, you need to upgrade your Mac OS 9 software to use the Classic environment. It's a good idea to use Mac OS 9.2 or later.
You cannot use Mac OS 9 applications on Intel-based Macintosh computers because the Classic environment is not supported.
For best results using Mac OS X, upgrade your Mac OS 9 applications to the Mac OS X version. Check with the manufacturers for more information. You can also check the Mac OS X website for information about the latest applications for Mac OS X.
To learn more about using Mac OS 9 (Classic) applications in Mac OS X, click the link below.