来源：
https://www.macrumors.com/2017/09/12/apple-itunes-12-7-no-app-store/
In a day filled with surprises, Apple has shocked us once again
with the release of iTunes 12.7,
which entirely revamps the iTunes App.
The new iTunes is designed to focus solely on music, movies, TV shows,
podcasts, and audiobooks, which means there is
no built-in App Store.
(iTunes 12.7 将无内建App Store)
Apps can now only be downloaded on an iOS device using an iOS device,
(Apps将可能只能透过iOS装置进行下载与安装)
and the same goes for ringtones.
(铃声也可能如App一样须使用iOS装置下载使用)
In addition to the removal of the App Store,
today's update adds support for syncing iOS 11 devices and includes support
for new Apple Music features that allow you to follow friends and
see what they're listening to.
(更新后也将支援iOS 11 ，
与新的Apple Music功能：探索并追踪你的朋友正在听什么音乐？？？？？这......)
If you previously used iTunes to sync apps or ringtones on your iOS device,
use the new App Store or Sounds Settings on iOS to redownload them
without your Mac.
(如果你之前使用iTuns来同步你的apps以及铃声，现在则须使用iOS中的App Store
以及 声音设定 来下载，不再需要使用到Mac)
The update is available for all iTunes users at no cost.
(我可以付你钱不要更新吗@@)
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因为iOS app store 有100mb限制，所以常利用手机热点分享网络给电脑后，
再透过iTunes来为iOS上的大型app更新，
但这样改下来对家中没有wifi的用户实在不太友善啊～～