OS X El Capitan comes with quite a few apps preinstalled, many of which are very useful…and some of which aren’t. Deleting these apps is simple: just drag them to the trash. Reinstalling them however, isn’t quite so cut and dried.

OS X El Capitan預裝了很多應用程序，其中許多非常有用，而有些則沒有。 刪除這些應用程序很簡單：只需將它們拖到垃圾箱即可。 然而，重新安裝它們并沒有那么干。

Let’s say that you decide to delete the Game Center app. Don’t worry,?we won’t blame you if you do. or maybe you decided you don’t need Pages, iMovie, or Keynote. You won’t get much benefit by deleting them, but you can.

假設您決定刪除Game Center應用。 不用擔心，如果您這樣做，我們也不會怪您。 也許您決定不需要Pages，iMovie或Keynote。 刪除它們不會帶來太多好處，但是可以。

But what?if you decide later that you want them back?

但是，如果您稍后決定要他們回來怎么辦？

Installing or reininstalling some?apps, including Pages, Keynote, and GarageBand is very easy. Just open the App Store, search for the app you’re seeking, and install it.

安裝或重新安裝某些應用程序(包括Pages，Keynote和GarageBand)非常容易。 只需打開App Store，搜索所需的應用程序，然后安裝它。

But other preinstalled apps aren’t on the App Store, which makes things a bit more complicated. On earlier versions of OS X, you could use the installation disc to reinstall the apps, but as of the most recent version of OS X–10.11 El Capitan–you need to reinstall the entire system.

但是其他預裝的應用程序不在App Store上，這使事情變得更加復雜。 在OS X的早期版本上，可以使用安裝光盤重新安裝應用程序，但是從最新版本的OS X–10.11 El Capitan起，您需要重新安裝整個系統。

如何還原默認應用 (How to Restore?Default Apps)

Before we start, we should reiterate:??even if you think these third-party apps are indeed superior replacements, don’t delete the original, default apps. They’re not doing anything other than taking up an insignificant amount of disk space.

在開始之前，我們應該重申：即使您認為這些第三方應用程序確實是高級的替代品，也請不要刪除原始的默認應用程序。 他們除了占用微不足道的磁盤空間外沒有做任何其他事情。

That said, if you’re reading this article, then you probably already have. In that case, head over to the App Store and download the El Capitan installer (if you don’t have it in your Applications folder already).

也就是說，如果您正在閱讀本文，那么您可能已經知道了。 在這種情況下，請轉到App Store并下載El Capitan安裝程序(如果您的Applications文件夾中還沒有安裝該程序)。

When you download and install El Capitan using the App Store, it’s important to know that it won’t erase your apps, documents, and other personal files, so when you reinstall OS X, your computer will appear just as you left it, except now you won’t be missing any apps.

當您使用App Store下載并安裝El Capitan時，一定要知道它不會擦除您的應用程序，文檔和其他個人文件，這一點很重要，因此，當您重新安裝OS X時，您的計算機會像您離開時一樣顯示，除了現在您將不會丟失任何應用程序。

You don’t have to reinstall OS X immediately upon downloading it from the App Store. The system installer can be found in the Applications folder, so you can reinstall it anytime you want without having to download it all over again.

從App Store下載OS X后，無需立即重新安裝OSX。 可以在“應用程序”文件夾中找到系統安裝程序，因此您可以隨時重新安裝它，而無需重新下載。

In either case, once you initiate the installer, simply follow the prompts.

無論哪種情況，一旦啟動安裝程序，只需按照提示進行操作即可。

Another thing to note: you cannot use the latest version of a default app, such as the Mail or iCal version that comes with El Capitan on an earlier version of OS X. Upgrading is required if you want to have the latest, greatest of everything.

需要注意的另一件事：您不能使用默認應用程序的最新版本，例如OS X早期版本上El Capitan隨附的Mail或iCal版本。如果要擁有最新，最好的所有功能，則需要升級。

If all goes well, this will solve your problem and your default apps will return. Just remember not to delete them again in the future, lest you want to go through this process again later down the line.

如果一切順利，這將解決您的問題，并且默認應用程序將返回。 請記住不要在將來再次刪除它們，以免您以后想再次執行此過程。

翻譯自: https://www.howtogeek.com/250223/how-to-reinstall-os-xs-default-apps-in-el-capitan/

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