Mac OS X: Classic System Folder Does Not Work With Earlier Versions of Mac OS X After 10.2 Update

  • Last Modified: September 09, 2003
  • Article: TA20846
  • Old Article: 106967
After a Mac OS 9 System Folder has been updated with Classic system resources from Mac OS X 10.2, it should not be used with Mac OS X 10.0 through 10.1.5.

Products Affected

Mac OS X 10.2, Mac OS X 10.0

Symptom

Classic is not usable after it is started, and an alert box you cannot dismiss may appear with this message:
    "The application 'Finder' has unexpectedly quit."


Note: The System Folder is not affected when used independently of Mac OS X.

Solution

Do not use a Mac OS 9 System Folder with Mac OS X 10.1.5 or earlier after it has been updated by Mac OS X 10.2.

You may use the following temporary workaround to use this System Folder within a Mac OS X 10.0 through 10.1.5 Classic environment:
    1. Before starting Classic, open the System Folder. Important: Do not confuse this with the folder named "System".
    2. Locate and drag these files, which are located in the top-level of the System Folder, to another folder, or to the desktop:
    • Classic
    • Classic Support
    • Classic Support UI
    3. Choose System Preferences from the Apple menu
    4. Choose Classic from the View menu.
    5. Click Start.
    6. Click OK when prompted to install Classic system resources.

Notes
    1. If you use this System Folder with Mac OS X 10.2 in the future, Mac OS X 10.2 will ask to update these Classic system resources again the first time that Classic is started.

    2. You can also avoid this issue by installing a licensed copy of the Mac OS 9 System Folder for each version of Mac OS X that is installed. Each System Folder should be used by only one version of Mac OS X.
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