Apple Macintosh LC 580 User Manual download pdf (Page 55)

If you are trying unsuccessfully to use a DOS floppy disk, consider the

following:

m When formatting floppy disks on a DOS computer for use in a Macintosh,

users need to format standard double-sided disks as 720K disks and high-

density disks as 1440K disks. Because DOS computers allow standard

double-sided disks to be formatted in 1440K format and high-density disks

to be formatted in 720K format, it’s possible that your disk has been given

a format that won’t work in a Macintosh.

If you think your DOS floppy disk might have a format that doesn’t work

in a Macintosh, use a DOS computer to copy the contents of your DOS

floppy disk onto another DOS floppy disk that has been properly formatted

for use in a Macintosh.

The pointer (

) freezes on the screen.

Your system has a software problem.

m Press x-Option-Esc to quit the application program in use when the

problem occurred. If this works, you can save the documents open in other

programs before restarting.

m Restart your Macintosh. (For instructions, see “Start Over” in the section

“When You Run Into Trouble” earlier in this chapter.) Most software

problems are temporary, and restarting usually corrects the problem.

m Check the startup disk and program you were using when the problem

occurred. Make sure that all programs, desk accessories, and system

extensions you’re using are compatible with the system software.

m Sometimes incompatible system extensions or control panels can cause

system software problems. Restart while holding down the Shift key; this

temporarily turns off all system extensions. If your computer works

normally after you do this, remove all extensions from the Extensions

folder (inside the System Folder) and put them back into the Extensions

folder one at a time. Restart after you add each extension. This procedure

should identify any incompatible extensions.

You can also use the Extensions Manager control panel to turn off

individual extensions. For information on using this control panel to

manage system extensions, see the “Setting Options” topic of Macintosh

Guide, available in the Guide (h) menu.

m If the problem recurs, you may need to reinstall system software. See

“Installing or Reinstalling System Software” later in this chapter for

instructions.

Troubleshooting

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Apple Macintosh LC 580 User Manual Page 55