A small number of application programs will not open unless the system font is set to Chicago. Others may require additional memory. If you have problems opening a program after you've installed Mac OS 9, do the following:
1. Open the Appearance control panel and set the large system font to Chicago, then open the program again. Or, contact the software manufacturer to see if an updated version of the program is available.
2. Select the program's icon, open the File menu and choose Get Info, and increase its minimum memory allocation by 300K. For more information, see the Memory topic in Mac Help.