ヘルプを表示させる方法
アップルのサイトと供にメーリングリストに載っていたこの情報が役に立ちました。
中でも特に9番が他のサイトで得られなかった情報です。
> 7. Click on the Targets tab, and then the application's target (in the upper
> left), to edit your application's target settings.
>
> 8. In the Application Settings panel, set the Identifer for your application
> (to something unique, like com.yourcompany.yourapplication).
>
> 9. Hit the Expert button to add the two custom help keys with string values,
> CFBundleHelpBookFolder, and CFBundleHelpBookName. These should be set to the
> name of the folder you added to your project, and the AppleTitle defined in
> your main help file, respectively.