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You can’t start an application program or it quits unexpectedly. Or, when you try to open
a program, you see a message that not enough memory is available.
One of the following is probably the cause:
m The Macintosh ran out of memory.
Quit the programs that you have open and then open the program you want
to use, or restart your Macintosh.
Use the Memory control panel to turn on virtual memory. For more
information on virtual memory, see both “Increasing Memory Available to
Run Applications” in the section “Working With Several Programs at a
Time” in Chapter 4 and the “Memory” topic of Macintosh Guide, available
in the Guide (h) menu.
m The program needs more memory.
Use the program’s Info window to give it more memory. (Select the
program’s icon and choose Get Info from the File menu.) For more
information on increasing a program’s memory, see the “Memory” topic of
Macintosh Guide, available in the Guide (h) menu.
m Sometimes incompatible system extensions or control panels can cause
software problems. Restart while holding down the Shift key to temporarily
turn off all system extensions.
If your program works normally after you do this, use the Extensions
Manager control panel (in the Control Panels folder in the Apple [K]
menu) to turn on individual extensions and control panels. Restart after you
turn on each extension. This procedure should identify incompatible
extensions and control panels. (If you just added new software to your
computer, its system extension is the most probable cause of the problem.)
For detailed instructions, see the information about managing system
extensions in the “Customizing Your Computer” topic of Macintosh Guide,
available in the Guide (h) menu.
If your program performs better when a particular extension or control
panel is turned off, contact the software’s manufacturer for information or
an upgrade.
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Troubleshooting