Note: If you are using Mac OS 9.2.1 and Mac OS X 10.1 , you already have the appropriate Startup Disk Control Panel installed and do not need to use the information in this document.
When both Mac OS 9 and Mac OS X are installed on the same computer, use Mac OS 9.2.2 for best results. You may update to Mac OS 9.2.2 from earlier Mac OS 9 versions by using Apple Software Downloads (
http://www.apple.com/swupdates/).
If Mac OS 9.0 to 9.0.4 is installed and you are unable to select the Mac OS X System folder in your Mac OS 9 Startup Disk control panel, you should install Mac OS 9.2.2. The Mac OS X 10.2 Classic environment cannot use a Mac OS 9.0 to 9.0.4 System Folder.
For a temporary workaround, you may install Startup Disk control panel 9.2.1, available from software download document120024, "
Startup Disk 9.2.1 Document and Software".
Notes
1. On some computer models, you can force-start up from Mac OS X by pressing the X key during startup.
2. If you have Mac OS X 10.0, you should restart your computer from Mac OS 9.1 or later before installing any Mac OS 9 software updates that you have downloaded.
3. For potentially related information, see technical document 107285, "Macintosh: Computer Can Start Up From Mac OS X But Not From Mac OS 9".