如果在恢复 iPhone(restoring an iPhone)时遇到通信问题，您的Mac或 PC 将抛出错误 4013 。当您的 iOS 设备始终拒绝超出启动屏幕(refuses to go beyond the startup screen)或直接启动进入恢复模式时，这是一个严重的问题。
iPhone 错误 4013 可能表示硬件故障。但是，在得出该结论之前，您可以解决几个问题。如果您在尝试恢复 iPad 时不断遇到类似错误，它们也应该会有所帮助。
除了错误 4013，以下建议也适用于错误代码 9、4005 和 4014。这些错误密切相关，并且经常出于相同的原因发生。
更新 macOS、Windows 和 iTunes(Update macOS, Windows, and iTunes)
更新 macOS、Windows和 iTunes 可以帮助修补已知的与软件相关的缺陷，这些缺陷会阻止您的计算机成功恢复您的 iPhone 或 iPad。
Mac – 更新 macOS 或 iTunes(Mac – Update macOS or iTunes)
从 macOS Catalina开始，您的Mac使用Finder连接到您的 iPhone。由于该程序已嵌入操作系统，因此您必须更新 macOS 本身以获得最新的Finder实例。前往Apple 菜单(Apple menu)>系统偏好设置(System Preferences)>软件更新(Software Update)，为您的Mac安装最新更新。
如果您的Mac运行的是使用 iTunes 的旧版 macOS，请打开Mac App Store，切换到“更新(Updates)”选项卡，然后为iTunes安装任何待处理的更新。
PC – 更新 iTunes 和 Windows(PC – Update iTunes and Windows)
在Windows上，您的 PC 使用 iTunes 与您的 iPhone 通信。要更新程序，请打开 iTunes 中的“帮助(Help)”菜单，然后选择“检查更新(Check for Updates)”选项。
如果您使用 iTunes 的Microsoft Store版本，则不会看到此选项，因为Windows会自动更新Microsoft Store应用程序。如果您禁用了自动更新，请打开Microsoft Store ，在更多(More)菜单上选择下载和更新(Downloads and Updates)，然后为iTunes安装任何待处理的更新。
除了 iTunes，更新Windows也是一个好主意。为此，请转到开始菜单(Start menu)>设置(Settings)>更新和安全(Update and Security)> Windows 更新(Windows Update)。
强制重启 iPhone (Force Restart iPhone )
强制重启（或硬重置）iPhone，然后尝试恢复设备可以帮助您避免 iPhone 错误 4013。但是，该过程因 iPhone 型号而异。iPad 也是如此。
iPhone 8 Series and Newer/iPads Without Home Button
按下并释放音量调高(Volume Up)按钮。立即按下并松开降低音量(Volume Down)按钮。然后，按住侧边(Side)/顶部(Top)按钮。
当 iPhone 或 iPad 重新启动并且Apple标志出现在屏幕上时，松开侧边(Side)/顶部(Top)按钮。
仅限 iPhone 7 系列(iPhone 7 Series Only)
同时按住降低音量(Volume Down)按钮和侧边(Side)按钮。当您的 iPhone 重新启动时，当您在屏幕上看到Apple标志时立即松开这两个按钮。
iPhone 6s Series and Earlier / iPads With Home Button
按住主页(Home)按钮和侧面(Side)/顶部(Top)按钮。在屏幕上看到Apple标志后松开两个按钮。(Release)
进入恢复模式(Enter Recovery Mode)
如果您的计算机在强制重启后未检测到您的 iPhone 或 iPad，则您必须手动进入恢复模式。
首先将设备连接到您的计算机。然后，执行强制重启所需的按钮按下。但是，当您看到Apple(Apple)标志时，不要松开您所按住的按钮（或多个按钮） 。您将很快进入恢复模式。然后，您可以选择恢复设备。
恢复前更新(Update Before Restore)
您是否尝试过更新您的 iPhone 或 iPad？进入恢复模式后，使用Finder或 iTunes 中 的更新(Update)选项来执行此操作。
如果在更新过程中没有看到错误 4013，请恢复设备。
直接插入(Plug in Directly)
您是否使用USB集线器将 iPhone 或 iPad 连接到Mac或 PC？尝试将其直接插入计算机本身的USB端口。如果已经是，请切换到另一个USB端口。
开关电缆(Switch Cables)
电缆会退化并导致各种连接问题。如果您仍然不断收到 iPhone 4013 错误消息，请尝试更换电缆，最好是从另一台 iOS 或 iPadOS 设备更换。除非经过 MFi 认证，否则请避免使用第三方线缆。(Avoid using a third-party cable)
使用另一台计算机(Use Another Computer)
iPhone 错误 4013 可能是您的计算机存在潜在问题的结果。如果您手头有另一台Mac或 PC，请尝试使用它来恢复您的 iPhone 或 iPad。记得(Remember)在更新之前更新 macOS、Windows和 iTunes。
使用 DFU 模式恢复(Restore Using DFU Mode)
如果您仍然收到错误 4013，请使用DFU（设备固件升级(Device Firmware Upgrade)）模式来恢复您的 iPhone。它的工作方式类似于标准恢复模式，但有助于恢复有严重问题的设备。
但是，进入DFU(DFU)模式的组合键可能相当复杂，可能需要尝试几次。开始之前，请确保将 iPhone 或 iPad 连接到计算机。
iPhone 8 Series and Newer/iPads Without Home Button
按下并释放音量调高(Volume Up)按钮。立即按下并松开降低音量(Volume Down)按钮。然后，按住侧边(Side)/顶部(Top)按钮。
屏幕一变黑，就开始按住降低音量(Volume Down)按钮（连同侧边(Side)按钮）5 秒钟(5 seconds)。然后，松开侧面(Side)按钮，但继续按下降低音量(Volume Down)按钮。
进入DFU模式后，iPhone 或 iPad 上的屏幕将继续保持空白，但设备会以恢复模式显示在Finder或 iTunes 中。然后，您可以松开降低音量(Volume Down)按钮。
仅限 iPhone 7 系列(iPhone 7 Series Only)
按住降低音量(Volume Down)和侧面(Side)按钮8 秒钟(8 seconds)。然后，松开侧面(Side)按钮，但继续按住降低音量(Volume Down)按钮。
进入DFU模式后，您将在(DFU)Finder或 iTunes上看到恢复模式屏幕。iPhone 屏幕将继续保持空白。然后您可以松开这两个按钮。
iPhone 6s Series and Earlier/iPads With Home Button
按住Home和Side / Top按钮8 秒钟(8 seconds)。然后，松开主页(Home)按钮，但继续按住侧面(Side)/顶部(Top)按钮。
进入DFU模式后，您将在(DFU)Finder或 iTunes上看到恢复模式屏幕。iPhone 或 iPad 上的屏幕将保持空白。然后您可以松开这两个按钮。
退出 DFU 模式(Exiting DFU Mode)
如果您想退出DFU模式，请使用 iPhone 或 iPad 型号的强制重启按钮组合。
预约(Book an Appointment)
如果上述修复没有帮助，那么您极有可能正在查看您的 iPhone 或 iPad 的硬件相关问题。由于在没有适当设备和培训的情况下打开或修复内部任何东西是很危险的(it’s dangerous to open or fix anything inside)，因此您最好的选择是将您的设备带到最近的Genius Bar或Apple 授权服务提供商处(Apple Authorized Service Provider)。
How to Fix iPhone Error 4013
Your Mac or PC will throw out an error 4013 if it runs into communication iѕsues while restoring an iPhone. This is a serious problem when you have an iOS device that either refuses to go beyond the startup screen or boots directly into recovery mode all the time.
An iPhone error 4013 could indicate a hardware fault. However, there are several fixes that you can work your way through before coming to that conclusion. They should also help if you keep getting a similar error while attempting to restore an iPad.
In addition to error 4013, the suggestions below apply to error codes 9, 4005, and 4014 as well. These errors are closely related and often occur for the same reason.
Update macOS, Windows, and iTunes
Updating macOS, Windows, and iTunes can help patch known software-related flaws that prevent your computer from successfully restoring your iPhone or iPad.
Mac – Update macOS or iTunes
Starting macOS Catalina, your Mac uses Finder to connect to your iPhone. Since the program is baked into the operating system, you must update macOS itself to get the most up-to-date instance of Finder. Go to Apple menu > System Preferences > Software Update to install the latest updates for your Mac.
If your Mac runs an older version of macOS that uses iTunes, open the Mac App Store, switch to the Updates tab, and then install any pending updates for iTunes.
PC – Update iTunes and Windows
On Windows, your PC uses iTunes to communicate with your iPhone. To update the program, open the Help menu in iTunes, and then select the Check for Updates option.
If you use the Microsoft Store version of iTunes, you won’t see this option since Windows updates Microsoft Store apps automatically. In case you have automatic updates disabled, open the Microsoft Store, select Downloads and Updates on the More menu, and then install any pending updates for iTunes.
iTunes aside, it’s also a good idea to update Windows. To do that, go to Start menu > Settings > Update and Security > Windows Update.
Force Restart iPhone
Force restarting (or hard resetting) an iPhone and then attempting to restore the device can help you avoid the iPhone error 4013. However, the process is different among iPhone models. The same goes for the iPad.
iPhone 8 Series and Newer/iPads Without Home Button
Press and release the Volume Up button. Immediately press and release the Volume Down button. Then, press and hold the Side/Top button.
Once the iPhone or iPad restarts and the Apple logo shows up on the screen, release the Side/Top button.
iPhone 7 Series Only
Press and hold the Volume Down button and the Side button at the same time. As your iPhone restarts, release both buttons as soon as you see the Apple logo on the screen.
iPhone 6s Series and Earlier / iPads With Home Button
Press and hold the Home button and the Side/Top button. Release both buttons once you see the Apple logo on the screen.
Enter Recovery Mode
If your computer doesn’t detect your iPhone or iPad after a force-restart, you must manually enter recovery mode.
Start by connecting the device to your computer. Then, perform the button presses needed to force-restart it. However, do not release the button (or buttons) that you are holding when you see the Apple logo. You will enter recovery mode soon after. You can then choose to restore the device.
Update Before Restore
Have you tried updating your iPhone or iPad? After entering recovery mode, use the Update option in Finder or iTunes to do that.
If you don’t see error 4013 during the update procedure, follow by restoring the device.
Plug in Directly
Do you use a USB hub to connect your iPhone or iPad to your Mac or PC? Try plugging it directly into a USB port on the computer itself. If it already is, switch to another USB port instead.
Switch Cables
Cables can degrade and cause all sorts of connectivity issues. If you still keep receiving the iPhone 4013 error message, try switching cables, preferably to one from another iOS or iPadOS device. Avoid using a third-party cable unless it’s MFi-certified.
Use Another Computer
The iPhone error 4013 may be the result of an underlying issue with your computer. If you have another Mac or PC at hand, try using it to restore your iPhone or iPad. Remember to update macOS, Windows, and iTunes before you do that.
Restore Using DFU Mode
If you still keep receiving error 4013, use DFU (Device Firmware Upgrade) mode to restore your iPhone. It works similarly to the standard recovery mode but helps restore devices with serious issues.
However, the key combination to enter DFU mode can be rather complicated and may take a few attempts. Before you start, make sure to connect your iPhone or iPad to your computer.
iPhone 8 Series and Newer/iPads Without Home Button
Press and release the Volume Up button. Immediately press and release the Volume Down button. Then, press and hold the Side/Top Button.
As soon as the screen turns blank, start holding down the Volume Down button (along with the Side button) for 5 seconds. Then, release the Side button, but keep pressing the Volume Down button.
Once you enter DFU mode, the screen on the iPhone or iPad will continue to remain blank, but the device will show up in Finder or iTunes in recovery mode. You can then release the Volume Down button.
iPhone 7 Series Only
Press and hold both the Volume Down and the Side buttons for 8 seconds. Then, release the Side button but keep holding the Volume Down button.
Once you enter DFU mode, you will see the recovery mode screen on Finder or iTunes. The iPhone screen will continue to remain blank. You can then release both buttons.
iPhone 6s Series and Earlier/iPads With Home Button
Press and hold both the Home and the Side/Top buttons for 8 seconds. Then, release the Home button but keep holding the Side/Top button.
Once you enter DFU mode, you will see the recovery mode screen on Finder or iTunes. The screen on your iPhone or iPad will remain blank. You can then release both buttons.
Exiting DFU Mode
Use the force-restart button combination for your iPhone or iPad model if you want to get out of DFU mode.
Book an Appointment
If the fixes above didn’t help, then it’s extremely likely that you are looking at a hardware-related issue with your iPhone or iPad. Since it’s dangerous to open or fix anything inside without the proper equipment and training, your best option is to take your device to the nearest Genius Bar or Apple Authorized Service Provider.
