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m If the hard disk is your startup disk, start your computer using the Disk
To o l s floppy disk or (if you have a built-in CD-ROM drive) with the
CD-ROM disc that contains system software. (For instructions on how to
start up your computer from the CD-ROM disc, see “Starting Up From a
CD-ROM Disc” in the section “Initializing a Hard Disk” later in this
chapter.) Then follow the instructions in “Repairing a Damaged Disk” later
in this chapter to test your startup hard disk and repair any damage.
If repairing the disk doesn’t help, follow the instructions in “Installing or
Reinstalling System Software” later in this chapter to reinstall system
software on your startup hard disk.
Icons do not appear correctly on your screen.
You need to rebuild the desktop—a process that helps your Macintosh keep
track of files and folders on your hard disk. For instructions, see “Rebuild
Your Desktop Regularly” in the section “When You Run Into Trouble” earlier
in this chapter.
If icons do not appear correctly after you rebuild the desktop, restart your
computer while pressing the Shift key to temporarily turn off system
extensions. When you see the “Welcome to Macintosh—extensions off”
message, release the Shift key and press the Option and x keys until you see a
message asking if you want to rebuild the desktop.
Your Macintosh can’t read a floppy disk.
If you see a message that a floppy disk is unreadable, try one of the following:
m If the disk has never been used, you may simply need to initialize it. For
instructions, see the “Disks” topic of Macintosh Guide, available in the
Guide (h) menu.
m The disk may be damaged. See “Repairing a Damaged Disk” later in this
chapter for information on testing and repairing disks.
If you are trying to use a DOS disk, consider the following:
m The disk may have been formatted incorrectly on a DOS computer. On
DOS computers it’s possible to format a standard double-sided disk in a
high-density (1440K) format, and vice versa. Disks formatted in this way
cannot be read by a Macintosh computer.
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Chapter 5