Apple Mac OS 9 - Manual (Page 12)

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2 Turn on the item you want to test by clicking its checkbox.
3 Close the Extensions Manager to continue startup.
4 Try the same actions that caused the problem.
If the problem does not occur again, then the item you turned on is probably compatible with
this version of the Mac OS.
If the problem occurs again, the item you turned on is probably incompatible. Open the
Extensions Manager control panel and click the item’s checkbox to deselect it.
5 Repeat steps 1 through 4 for each item you want to test.
If you find that a piece of software is incompatible, turn it off or remove it from your computer,
then contact the manufacturer of the software to see if an updated version is available.
Performing a Clean Installation
This section provides instructions for what is commonly called a clean installation of system
software. A normal system software installation replaces changed system files and adds new
ones, but leaves other files alone. A clean installation creates a completely new System Folder
on your hard disk.
Performing a clean installation can be a lengthy procedure, but if you have tried other
troubleshooting methods and are still experiencing problems, it may help.
1 Start up your computer from the Mac OS CD.
2 Open the Mac OS Installer application.
3 In the Select Destination window of the Installer, click the Options button.
4 Click the Perform Clean Installation checkbox to select it, then click OK.
5 Follow the onscreen instructions to begin the installation.
When the installation is finished, you can reinstall extensions, fonts, control panels,
applications, and other items not installed with the Mac OS from their original disks. If you
don’t have the original disks, you can drag the items one at a time from the Previous System
Folder to the new System Folder. To make sure the software is compatible with this version of
the Mac OS, you should restart your computer after you reinstall each item.
Important A clean installation creates a completely new System Folder. This means you must
reinstall any non-Apple extensions, fonts, and control panels after you do the installation.
Before you begin, write down your Internet settings (from the Modem, TCP/IP, and Remote
Access control panels). Some of your application programs might also need to be reinstalled
after you perform a clean installation, particularly if they rely on files that used to be in the
System Folder.