Symptom
Help Center and Mac Help are not available from the Help menu.
Solution
1. Make sure the Apple Guide extension is installed in the Extensions folder, or is turned on in the Extensions Manager control panel.
2. Make sure the computer has enough memory to load the Apple Guide extension. Even if the Apple Guide extension is installed it may not load if there is not enough memory installed in the computer. This may be the case if you start up the computer from a CD-ROM disc with virtual memory turned off.