Sidecar描述了让Mac用户将 iPad 用作第二个显示器的技术。如果你对这个术语不熟悉，这篇解释 Apple Sidecar 工作原理(article explaining how Apple Sidecar works)的文章有你需要知道的一切。
在这篇文章中，我们将列出 11 个故障排除步骤，如果Sidecar无法在您的Mac上运行。
1. 检查您的电缆连接
如果您的设备通过USB电缆连接，您需要确保您的 iPad 配置为信任您的Mac。当您第一次将 iPad 插入Mac时，您应该会看到一个提示，要求您确认是否信任Mac。如果您没有收到提示，请从Mac上拔下 iPad ，重新插入，然后按照以下步骤操作。
- 启动Finder ，在(Finder)Locations部分中选择您的 iPad ，然后选择Trust按钮。
- 然后，在 iPad 显示屏上显示的确认提示上点击信任。(Trust)
- 输入您的 iPad 密码以继续。然后，尝试再次启动Sidecar会话并检查它是否有效。
我们还建议尝试使用不同的USB电缆。Sidecar支持 Lightning 和USB -C 电缆，但您需要确保您的电缆是正品且状况良好。损坏、破损或磨损的电缆可能会破坏Sidecar连接。如果通过USB连接时您的 iPad 仍未显示在Mac上，请使用其他线缆并重试。
2.将(Move) 设备(Devices) 移近(Closer)并启用切换(Enable Handoff)
如果您通过蓝牙(Bluetooth)无线使用Sidecar，Apple建议您将Mac和 iPad 放在 10 米（约 30 英尺）的距离内。因此，如果您的设备相距很远，请尝试将它们靠得更近，并检查您是否能够启动Sidecar会话。
还有一件事：您的设备需要在您的设备上具有Handoff（一种支持数据传输的连续性功能）。(Continuity feature)在 iPad 上启动“设置”(Settings)应用程序，转到“通用(General)” > “AirPlay 和接力”(AirPlay & Handoff)并打开“接力(Handoff)”选项。
在您的 Mac 上，前往“设置”(Settings) > “通用”并选中“允许在这台(General)Mac和您的 iCloud 设备之间进行切换”。
3. 检查您的 Wi-Fi 连接
Sidecar不需要互联网访问。该功能仅通过无线网络上托管的直接对等连接来连接您的设备。检查您设备的Wi-Fi菜单并确保它们在同一网络上。重新启动路由器也可以解决问题。
4.禁用个人热点(Hotspot)和互联网共享(Internet Sharing)
您需要确保您的 iPad 和Mac没有共享它们的互联网连接。否则，您可能会在使用Sidecar(Sidecar)功能时遇到困难。如果您的 iPad 是蜂窝型号，请前往“设置”(Settings) > “蜂窝(Cellular)” > “个人热点(Personal Hotspot)”并关闭“允许其他人(Others)加入”。在您的Mac上，转到系统偏好设置(System Preferences)>共享(Sharing)并取消选中Internet 共享(Internet Sharing)选项。
5. 更新您的设备
Apple Sidecar需要运行 iPadOS 13 或更高版本的 iPad 和运行macOS Catalina或更高版本的(Catalina)Mac。如果您的任何设备不符合软件要求，您将无法启动边栏会话。(Sidebar)前往Mac(Mac)和 iPad的软件更新部分，确保它们是最新的。
要更新您的 iPad，请前往“设置”(Settings) > “通用(General)” > “软件更新”(Software Update)，然后点击“下载并安装(Download and Install)” 。您需要快速且强大的 Wi-Fi 连接才能安装 iPadOS 更新。
之后(Afterward)，将您的Mac连接到 Wi-Fi 网络并前往系统偏好设置(System Preferences)>软件更新(Software Update)。您的Mac将自动检查新的 macOS 更新并显示“立即更新”(Update Now)按钮。单击(Click)该按钮可将您的Mac更新到最新的 macOS 版本。
6.检查硬件不兼容(Hardware Incompatibility)
Sidecar还具有严格的硬件要求。该功能适用于iPad Air（第 3 代或更新版本）、iPad mini（第 5代(Gen)或更新版本）以及iPad Pro的所有型号。
前往“设置”(Settings) > “通用(General)” > “关于(About)”并检查“型号名称”(Model Name)行以查看 iPad 的型号。
如果您的Mac较旧，您需要将设备更改为以下任何兼容型号：
- MacBook 和 MacBook Pro：(MacBook and MacBook Pro:) 2016 年或之后推出。
- MacBook Air： 2018 年或之后推出。
- iMac： 2017 年或更晚推出。
- Mac mini： 2018 年或之后推出。
- Mac Pro：于 2019 年推出。
要检查 Mac 的型号，请单击菜单栏上的Apple 标志(Apple logo)并转到概览(Overview)选项卡。在页面上，您会找到 Mac 的发布年份，以及基本的软件和硬件配置。
同样(Again)，请记住，您的Mac和 iPad 必须至少使用 macOS 10.15 Catalina（或更高版本）和 iPad OS 13（或更高版本）才能使 Sidecar 正常工作。
7.重新启用蓝牙
如果您的 iPad 和Mac通过蓝牙(Bluetooth)连接，禁用和重新启用两台设备上的蓝牙(Bluetooth)可以解决问题。启动 iPad 和Mac的控制中心(Control Center)并禁用蓝牙(Bluetooth)。然后，等待大约一分钟，重新启用设备的蓝牙(Bluetooth)。
8. 检查您的 Apple ID 帐户
要使用Sidecar，您必须将Mac和 iPad 登录到同一个Apple ID帐户。打开Mac的系统偏好设置(System Preferences)，选择Apple ID，转到“姓名(Name)、电话(Phone)、电子邮件”选项卡，然后检查Apple ID地址。
在您的 iPhone 上，打开设置(Settings)，点击您的Apple ID 名称(Apple ID name)并检查页面上的Apple ID地址。
如果地址不匹配，请在Mac或 iPad上退出Apple ID，然后将两台设备连接到同一个帐户。
9.重启你的设备
如果在尝试这些故障排除解决方案后Sidecar仍然无法正常工作，请关闭您的设备并重新打开电源。对于Mac，单击菜单栏上的Apple标志并选择(Apple)重新启动(Restart)。
要关闭 iPad，请按住顶部按钮和任一音量按钮。或者，前往“设置”(Settings) > “通用(General)” > “关机”(Shut Down)，拖动滑块，然后等待 30 秒，让 iPadOS 完全关闭。
重新启动 iPad，通过USB或蓝牙将其连接到(Bluetooth)Mac，将两台设备连接到同一个Wi-Fi网络，然后启动Sidecar会话。
10. 重置 iPad 的网络设置(Network Settings)
此 Apple 讨论线程(this Apple discussion thread)中的一些 iPad 用户通过重置其设备的网络设置使 Sidecar 再次工作。(Sidecar)打开 iPad 的“设置”(Settings)应用，转到“通用(General)” > “重置(Reset)” > “重置网络设置”(Reset Network Settings)，输入设备密码，然后在确认提示中点击“重置”。(Reset)
将 iPad 连接到与Mac(Mac)相同的网络，并检查它是否出现在Mac的Sidecar菜单中。
11.检查防火墙配置
如果Mac 的防火墙配置(Mac’s firewall configuration)阻止传入连接，您可能无法使用Sidecar 。按照以下步骤重新配置 Mac 的防火墙以允许屏幕共享和文件共享连接。
- 打开System Preferences，选择Security & Privacy，转到Firewall选项卡，然后单击屏幕左下角的锁定图标。(lock icon)
- 输入 Mac 的密码或使用Touch ID进行身份验证。
- 单击防火墙选项(Firewall Options)按钮。
- 取消选中“阻止所有传入连接”选项，然后单击OK。
让我们知道这些故障排除步骤中的哪些解决了您设备上的问题。如果您有任何问题，请在下方留言。
FIX: Sidecar Not Working with iPad
Sidecar describes the technology that lets Mac owners use an iPad as a second display. If this term is new to you, this article explaining how Apple Sidecar works has everything you need to know.
In this post, we’ll list 11 troubleshooting steps to take if Sidecar is not working on your Mac.
1. Check Your Cable Connection
If your devices are connected via a USB cable, you need to ensure your iPad is configured to trust your Mac. When you plug an iPad into your Mac for the first time, you should see a prompt asking you to confirm whether or not you trust the Mac. If you didn’t get the prompt, unplug the iPad from your Mac, plug it back in, and follow the steps below.
- Launch Finder, select your iPad in the Locations section, and select the Trust button.
- Afterward, tap Trust on the confirmation prompt that shows up on your iPad’s display.
- Enter your iPad’s passcode to proceed. Then, try starting the Sidecar session again and check if it works.
We also recommend trying a different USB cable. Sidecar supports both lightning and USB-C cables, but you need to ensure your cable is authentic and in good condition. A damaged, broken, or frayed cable can ruin the Sidecar connection. If your iPad still doesn’t show up on your Mac when connected via USB, use a different cable and try again.
2. Move Devices Closer and Enable Handoff
If you’re using Sidecar wirelessly via Bluetooth, Apple recommends having your Mac and iPad within a 10 meter (~30 feet) distance. So if your devices are far apart, try moving them closer together and check if you’re able to start a Sidecar session.
One more thing: your devices need to have Handoff (a Continuity feature that powers data transfer) on your devices. Launch the Settings app on your iPad, go to General > AirPlay & Handoff and toggle on the Handoff option.
On your Mac, go to Settings > General and check “Allow Handoff between this Mac and your iCloud devices.”
3. Check Your Wi-Fi Connection
Sidecar doesn’t require internet access. The feature only connects your devices through a direct peer-to-peer connection hosted on your wireless network. Check your device’s Wi-Fi menu and ensure they’re on the same network. Restarting your router could also resolve the problem.
4. Disable Personal Hotspot and Internet Sharing
You need to ensure your iPad and Mac aren’t sharing their internet connection. Otherwise, you might encounter difficulties using the Sidecar functionality. If your iPad is a cellular model, go to Settings > Cellular > Personal Hotspot and toggle off “Allow Others to Join.” On your Mac, go to System Preferences > Sharing and uncheck the Internet Sharing option.
5. Update Your Devices
Apple Sidecar requires an iPad running iPadOS 13 or later and a Mac with macOS Catalina or newer. You won’t be able to initiate a Sidebar session if any of your devices don’t meet the software requirement. Head to the software update section of your Mac and iPad and ensure they’re up-to-date.
To update your iPad, head to Settings > General > Software Update and tap Download and Install. You’ll need a fast and strong Wi-Fi connection to install an iPadOS update.
Afterward, connect your Mac to a Wi-Fi network and head System Preferences > Software Update. Your Mac will automatically check for new macOS updates and display an Update Now button. Click the button to update your Mac to the latest macOS version.
6. Check for Hardware Incompatibility
Sidecar also comes with strict hardware requirements. The feature works with iPad Air (3rd Gen or newer), iPad mini (5th Gen or newer), and all models of the iPad Pro.
Go to Settings > General > About and check the Model Name row to see the model of your iPad.
If your Mac is old, you’ll need to change your device to any of these compatible models:
- MacBook and MacBook Pro: launched in 2016 or later.
- MacBook Air: launched in 2018 or later.
- iMac: launched in 2017 or later.
- Mac mini: launched in 2018 or later.
- Mac Pro: launched in 2019.
To check your Mac’s model, click the Apple logo on the menu bar and go to the Overview tab. On the page, you’ll find your Mac’s launch year, as well as basic software and hardware configurations.
Again, remember that your Mac and iPad must be using at least macOS 10.15 Catalina (or newer) and iPad OS 13 (or newer) for Sidecar to work.
7. Re-Enable Bluetooth
If your iPad and Mac are connected via Bluetooth, disabling and re-enabling Bluetooth on both devices can fix the problem. Launch your iPad and Mac’s Control Center and disable Bluetooth. Then, wait for about a minute and re-enable the devices’ Bluetooth.
8. Check Your Apple ID Accounts
To use Sidecar, you must sign your Mac and iPad to the same Apple ID account. Open your Mac’s System Preferences, select Apple ID, go to the “Name, Phone, Email” tab, and check the Apple ID address.
On your iPhone, open Settings, tap your Apple ID name and check the Apple ID address on the page.
If the addresses don’t match, sign out of Apple ID on either your Mac or iPad, and connect both devices to the same account.
9. Restart Your Devices
If Sidecar still doesn’t work after trying these troubleshooting solutions, shut down your devices and power them back on. For Mac, click the Apple logo on the menu bar and select Restart.
To shut down your iPad, press and hold the top button and either of the volume buttons. Alternatively, head to Settings > General > Shut Down, drag the slider, and wait 30 seconds for iPadOS to shut down completely.
Restart your iPad, connect it to your Mac via USB or Bluetooth, connect both devices to the same Wi-Fi network, and initiate a Sidecar session.
10. Reset Your iPad’s Network Settings
Some iPad users in this Apple discussion thread got Sidecar working again by resetting their device’s network settings. Open your iPad’s Settings app, go to General > Reset > Reset Network Settings, enter your device’s passcode, and tap Reset on the confirmation prompt.
Connect your iPad to the same network as your Mac and check if it appears on your Mac’s Sidecar menu.
11. Check Firewall Configuration
You may be unable to use Sidecar if your Mac’s firewall configuration is blocking incoming connections. Follow the steps below to reconfigure your Mac’s firewall to allow screen-sharing and file-sharing connections.
- Open System Preferences, select Security & Privacy, go to the Firewall tab and click the lock icon at the bottom-left corner of the screen.
- Enter your Mac’s password or authenticate using Touch ID.
- Click the Firewall Options button.
- Uncheck the “Block all incoming connections” option and click OK.
Let us know which of these troubleshooting steps resolved the issue on your device. Drop a comment below if you have any questions.
