Mac App Store 拥有大量应用程序和实用程序(great collection of apps and utilities)，您只需单击一个按钮即可下载这些应用程序和实用程序。听起来很简单，但有时某些复杂情况会阻止Apple Store安装新应用或更新旧应用。
发生这种情况有几个原因。互联网连接速度慢(Slow)或较差可能会阻止您的Mac连接到App Store服务器。不正确的日期和时间设置也可能导致此问题，因此请确保正确配置Mac上的日期和时间。(Mac)还有一件事：取消并重新开始下载；这可能会有所帮助。
如果在尝试这些基本解决方案后App Store仍未下载应用程序，我们相信至少以下一种故障排除方法应该会有所帮助。
1. 检查您的互联网连接
App Store是一项依赖互联网的服务。要从商店下载或更新应用程序，您的Mac必须有互联网连接。一个活跃和快速的连接。如果您可以访问App Store，但它没有启动应用程序下载，或者您的下载在某个时候卡住了，则您的互联网连接可能很差。
在Mac(Mac)上的多个应用程序中运行多个下载可能会导致此问题。例如，在Chrome或Safari上下载电影可能会延迟App Store上的应用下载。暂停(Pause)任何其他活动下载并尝试重新安装受影响的应用程序。
您还应该确保您的互联网路由器工作正常。重新启动路由器，将其重新定位到没有干扰的位置，或者使用范围扩展器或电力线适配器（(range extender or powerline adapter)如果有）。这可能有助于增强路由器的信号(boost your router’s signal)。如果连接问题仍然存在，请联系您的Internet 服务提供商(Internet Service Provider)或将 Wi-Fi 路由器重置(reset the Wi-Fi router)为出厂默认设置。
如果App Store以外的其他应用程序可以使用您 Mac 的互联网连接，则可能是App Store服务器已停止服务。继续下一部分以找出答案。
2.查看App Store服务器状态(App Store Server Status)
尽管Mac App Store服务器几乎总是处于活动状态，但有时它们会停止服务。因此，如果您无法在App Store 或(App Store—or)几乎任何Apple应用程序/服务上执行任何操作，尽管有有效的互联网连接，请访问Apple 系统状态(Apple System Status)页面并检查服务是否遇到问题。
注意页面上Mac App Store(Mac App Store)旁边的颜色。如果它是除绿色以外的任何其他颜色，则Mac App Store服务器可能处于脱机状态。
在这种情况下，您必须等到Apple恢复服务后才能从商店下载应用程序。
3.强制退出App Store
App Store可能会因临时系统或应用内故障而出现故障。关闭应用程序并在重新启动时重试下载。打开活动监视器(Open the Activity Monitor)（转到Finder > Applications > Utilities）并在进程窗口中选择App Store 。单击活动监视器(Activity Monitor)左上角的x 图标(x icon)，然后在确认提示中选择强制退出。(Force Quit)
您还应该强制退出App Store Agent。如果此过程无法正常运行，您可能会遇到App Store无法下载应用程序的困难。(App Store)关闭此过程将刷新商店并有望解决问题。
在Activity Monitor中搜索appstoreagent，选择对应的进程，点击x 图标(x icon)，选择Force Quit。
当您启动App Store时，macOS 将自动重新启动该过程。
4.清除App Store缓存文件夹
如果Apple Store没有下载应用程序，可能是因为App Store的文件夹中存在损坏或格式错误的文件。删除此文件夹的内容应该可以解决问题。关闭App Store并按照以下步骤操作。
1. 转到Finder >应用程序( Applications)>实用程序( Utilities)并启动终端(Terminal)。
2. 将以下命令粘贴到终端(Terminal)控制台中，然后按Return。
open $TMPDIR../C/com.apple.appstore/
这会将您重定向到App Store缓存文件夹。将此文件夹的内容移至垃圾箱(Trash)或Mac上的其他文件夹。
关闭文件夹，启动App Store并重新下载应用程序。
如果您仍然无法下载应用程序，您的Mac可能无法连接到您的Apple ID或 iCloud 帐户。查看下一个解决方案，了解如何在App Store上解决与帐户相关的问题。
5. 退出 App Store
如果没有Apple ID帐户，就无法从App Store更新或下载应用程序。(App Store)如果您尚未登录，请单击App Store(App Store)左下角的个人资料图标以连接您的Apple ID或 iCloud 帐户。
但是，如果您已登录App Store但无法下载应用程序，请退出并重新登录。打开App Store，单击菜单栏上的 Store 并选择Sign (Store)Out(Sign Out)。
等待(Wait)一两分钟，然后再次登录App Store。
6. 重置 Mac 的钥匙串
一些遇到类似问题的Mac用户可以通过重置(Mac)Apple Keychain(the Apple Keychain)来修复它。如果上面提到的所有解决方案都失败了，你可以试试这个。
1. 前往Finder > Applications > Utilities并启动Keychain Access。
2. 单击菜单栏上的Keychain Access并选择(Keychain Access)Preferences。
3. 单击重置我的默认钥匙串(Reset My Default Keychains)。
4. 输入您的 Mac 的登录密码，然后单击确定(OK)继续。
您可能会收到“此Mac无法连接到 iCloud”的错误消息。要解决此问题，请单击错误提示上的Apple ID 首选项以重新连接您的(Apple ID Preferences)Apple ID帐户。
输入(Enter)您的Apple ID密码并点击Next。
其他要尝试的事情
重新启动Mac还可以解决导致App Store出现故障的任何系统并发症或故障。单击(Click)菜单栏上的Apple标志并选择(Apple)重新启动(Restart)。确保您手动关闭应用程序，以免丢失任何未保存的文档。
最后，值得一提的是，Apple macOS 中的错误可能只是问题的根本原因。如果有适用于您的Mac的更新（转至系统偏好设置(System Preferences )>软件更新( Software Update)以确认），请安装它并检查是否可以解决App Store下载问题。
Apple Store Not Downloading Apps on Mac? 6 Ways to Fix
The Mac App Store has a great collection of apps and utilities that you can download at the click of a button. As easy as that sounds, there are times when certain complications will prevent the Apple Store from installing new apps or updating the old ones.
This happens for a handful of reasons. Slow or poor internet connectivity can prevent your Mac from connecting to the App Store server. Incorrect date and time settings could also cause this issue, so make sure the date and time on your Mac is correctly configured. One more thing: cancel and restart the download; that might help.
If the App Store is still not downloading apps after trying these basic solutions, we’re confident that at least one of the troubleshooting methods below should help.
1. Check Your Internet Connection
The App Store is an internet-dependent service. To download or update apps from the store, your Mac must have an internet connection. An active and fast connection at that. If you can access the App Store but it doesn’t initiate app downloads, or your downloads get stuck at some point, you might have a poor internet connection.
Running multiple downloads across several apps on your Mac could cause this issue. For instance, downloading a movie on Chrome or Safari could delay app downloads on the App Store. Pause any other active downloads and try reinstalling the affected app(s).
You should also make sure your internet router is working correctly. Reboot the router, reposition it to a location that’s free of interference, or use a range extender or powerline adapter if you have one. That could help to boost your router’s signal. If the connectivity issue persists, contact your Internet Service Provider or reset the Wi-Fi router to factory default.
If other applications but the App Store can use your Mac’s internet connection, maybe the App Store servers are out of service. Proceed to the next section to find out.
2. Check the App Store Server Status
Although the Mac App Store servers are almost always active, there are times when they go out of service. So if you’re unable to perform any action on the App Store—or pretty much any Apple app/service—despite having an active internet connection, visit the Apple System Status page and check if the service is experiencing an issue.
Look out for the color next to Mac App Store on the page. If it’s any other color but green, the Mac App Store servers are probably offline.
In that case, you’ll have to wait till Apple restores the service before you can download apps from the store.
3. Force Quit the App Store
The App Store can malfunction due to temporary system or in-app snags. Close the app and retry the downloads when you relaunch it. Open the Activity Monitor (go to Finder > Applications > Utilities) and select the App Store in the processes window. Click the x icon at the top-left corner of the Activity Monitor and select Force Quit on the confirmation prompt.
You should also force quit the App Store Agent. You might experience difficulties with the App Store not downloading apps if this process isn’t working correctly. Closing this process will refresh the store and hopefully resolve the problem.
Search for appstoreagent in Activity Monitor, select the corresponding process, click the x icon, and select Force Quit.
macOS will automatically restart the process when you launch the App Store.
4. Clear the App Store Cache Folder
If the Apple Store isn’t downloading apps, it could be due to the presence of corrupt or malformed files in the App Store’s folder. Deleting the content of this folder should resolve the problem. Close the App Store and follow the steps below.
1. Go to Finder > Applications > Utilities and launch Terminal.
2. Paste the command below in the Terminal console and press Return.
open $TMPDIR../C/com.apple.appstore/
That will redirect you to the App Store cache folder. Move the content of this folder to Trash or another folder on your Mac.
Close the folder, launch App Store, and redownload the app(s).
If you still can’t download apps, your Mac might have difficulties connecting to your Apple ID or iCloud account. Check out the next solution to learn how to fix account-related problems on the App Store.
5. Log Out of App Store
It’s impossible to update or download apps from the App Store without an Apple ID account. If you aren’t signed in, click the profile icon at the bottom-left corner of the App Store to connect your Apple ID or iCloud account.
However, if you’re signed into the App Store but unable to download apps, log out and sign back in. Open the App Store, click Store on the menu bar and select Sign Out.
Wait for a minute or two and sign in to the App Store again.
6. Reset Your Mac’s Keychain
Some Mac users who had encountered similar issues were able to get it fixed by resetting the Apple Keychain. You can try this if all the solutions mentioned above prove abortive.
1. Go to Finder > Applications > Utilities and launch Keychain Access.
2. Click on Keychain Access on the menu bar and select Preferences.
3. Click Reset My Default Keychains.
4. Enter your Mac’s login password and click OK to proceed.
You may get an error that reads “This Mac can’t connect to iCloud.” To fix this, click Apple ID Preferences on the error prompt to reconnect your Apple ID account.
Enter your Apple ID password and hit Next.
Other Things to Try
Rebooting your Mac could also resolve any system complication or glitch causing the App Store to malfunction. Click the Apple logo on the menu bar and select Restart. Make sure you manually close your apps so you don’t lose any unsaved documents.
Finally, it’s worth mentioning that a bug in Apple’s macOS might just be the root cause of the problem. If there’s an update available for your Mac (go to System Preferences > Software Update to confirm), install it and check if that resolves the App Store download issue.
