Why can't Apple?

A dime of the apple can't be downloaded: it may be that the network cable used by the user is broken, which makes it impossible to load the page browsed by the user. It may be that the user's equipment system space is insufficient, which affects the operation of the software. The version of the software downloaded by the user is too low, or the server side of the software is blocked. So that users are currently unable to access it.