Step 1: Verify the Problem
To verify that you have a compatibility problem, follow these steps:
1. Start up your computer while holding down the Space bar. When the Extensions Manager control panel appears, release the Space bar.
2. Open the Selected Set menu and choose the item with the words "Mac OS Base." This turns off all extensions and control panels except those installed with the Mac OS.
3. Close the Extensions Manager to continue startup.
4. When the computer is finished starting up, try the same actions that caused the problem.
If the problem no longer occurs, you probably have an extension or control panel that doesn't work with this version of the Mac OS. Continue with the steps in "Test Individual Extensions and Control Panels," next, to identify the item that is causing the problem.
If the problem still occurs, try checking your hard disk for problems using the Disk First Aid utility, provided on the Mac OS CD. If the problem occurs only when using a certain program, that program is probably not compatible or may need to be reinstalled. Check with the program's manufacturer for information.
Step 2: Test Individual Extensions and Control Panels
To test an individual extension or control panel for compatibility, follow these steps:
1. Restart your computer while holding down the Space bar. The Extensions Manager appears again.
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.