Symptom
Third-party components of QuickTime 5 do not install if the user's preferred language is Brazilian Portuguese, or Danish.
Solution
As a workaround, users familiar with English may install the components by following these steps:
1. Open System Preferences.
2. Click International.
3. Click the Language tab (if necessary) and drag English to the top of the list.
4. Choose Log out from the Apple menu.
5. Log in.
6. Connect to the Internet.
7. Open the QuickTime Player application.
8. Choose Update Existing Software from the QuickTime Player application menu. The software updates will now install.
When you've finished installing the updates, you can set the language back to Brazilian Portuguese, or Danish following the same steps.