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TOPIC
Performing a Clean Installation
is part two of Chapter 4: Reinstalling Your Computer's Software, part of the Troubleshooting Handbook.
DISCUSSION
Performing a Clean Installation
This section provides instructions fo a clean installation of system software. A normal system software installation replaces changed system files and adds new ones, but leaves other files alone. When you install system software using a clean installation, the Installer creates a new System Folder on your hard disk. The old System Folder is renamed Previous System Folder.
Note: Performing a clean installation does not erase the contents of your hard disk. Performing a clean installation can be a complicated and lengthy procedure, but if you are experiencing problems or your computer seems slow, it may help.
After you do a clean installation, your computer has a new System Folder. Once you ensure your computer is working properly, you'll need to reinstall any non-Apple extensions, fonts, and control panels. If your computer came with preinstalled software, some of those programs may need to be reinstalled, particularly if those programs rely on files that used to be in the System Folder. For more information, see "Reinstalling Individual Applications" on page 41.
1. Write down your Internet settings (from the Modem, TCP/IP, and Remote Access control panels). You'll need to enter these settings in the control panels once the clean installation is finished.
2. Make sure the Caps Lock key is not engaged.
3. Start up your computer from the software install CD. (See Chapter 2, " Starting Up From a CD ")
4. Double-click the Mac OS Install icon to open the Installer.
5, In the Welcome dialog box, click Continue.
The Select Destination dialog box appears.
Figure 1 , The Select Destination dialog box
6. Click the Options button.
7. Click the Perform Clean Installation checkbox to select it, then click OK.
8. Select the destination hard disk, then click the Select button.
9. Click Start to begin the installation.
If you want to customize your installation, click Add/Remove after selecting the destination
disk, and see
"Custom Installation"
A new System Folder is installed on your hard disk. (The old System Folder is renamed Previous System Folder.)
10. When the Mac OS Install is finished, restart your computer to make sure it's working properly.
11. Reinstall extensions, fonts, control panels, and other items not installed with the Mac OS
from their original disks.
If you don't have the original disks, you can drag these 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, restart your computer after you reinstall each item.
12. After you're sure that you've copied all the items you want to save into your new System Folder, delete the Previous System Folder from your hard disk.
If the Clean Installation Didn't Solve the Problem
You may want to revert to the Previous System Folder so that you do not have to reinstall your custom extensions, fonts, control panels, and other items not installed with Mac OS 8.
To use the previous system again, follow the steps in this section.
1. Locate the active System Folder. It has the Mac OS icon on it.
2. Open the System Folder and move the System file into the Preferences folder. Close the System Folder.
3. Rename the System Folder "Clean System Folder."
4. Rename the Previous System Folder (the one you wish to use again) "System Folder."
5. Open the newly designated System Folder and double-click the System file. Close the window that appears, then close the System Folder.The Mac OS icon should appear on the System Folder's icon.
6. Restart your computer.
7. Once you are sure your computer is working properly, drag the Clean System Folder to the Trash.
If this doesn't work, you may have a hardware problem. Consult an Apple-authorized service provider.
Note
: This procedure may not work. If it does not, you will have to perform a clean installation again.
Links to other sections of Chapter 4: Reinstalling Your Computer's Software: