Follow the steps in this article If your download does not automatically resume, or if you see this alert:
"The application could not be downloaded."
The application you tried to download could not be
downloaded. Check your internet connection and try
To resume your download:
- Open the Mac App Store.
- From the Store menu, choose Sign In.
- Enter your Apple ID and password.
- Click Purchases to get to your Purchases Page.
- Click the Resume button next to the app name.