How To Uninstall Mac OS 9
From Applepedia
If you realize you haven't rebooted to OS 9, or started up Classic in over a year, it might be time to get rid of Mac OS 9. It's really easy.
- Take the folder marked "System Folder", with a folder icon with an orange "9" overlayed on it. (NOT "System" with a blue X)
- Drag it to the Trash.
- Empty the Trash.
It's that easy!

