Universal Control 是否(Does Universal Control)无法在您的Mac和 iPad 上启动？兼容性(Compatibility)问题、功能限制和错误配置的设置通常会导致这种情况。
仔细阅读下面的建议和解决方案，让Universal Control功能再次在您的Mac和 iPad 上运行。
1.重启设备
如果您直到刚才还可以毫无问题地使用Universal Control ，请尝试重新启动您的(Universal Control)Mac和 iPad。这应该可以消除任何与软件相关的故障，从而阻止该功能正常工作。
重启 Mac
打开Apple菜单并选择重新启动(Restart)。然后，清除重新登录时重新打开(Reopen)窗口旁边的框，然后再次选择重新启动(Restart)。
重启 iPad
打开设置(Settings)应用程序，然后点按General > Shut Down。接下来(Next)，将电源(Power)滑块向右拖动，等待 30 秒，然后按住顶部按钮重新启动设备。
2.检查设备的兼容性
与Sidecar一样，Universal Control仅适用于较新的Mac(Macs)和 iPad。如果您是第一次尝试使用该功能，最好检查您的设备是否兼容。
检查 Mac 的兼容性
Universal Control从 2018 年起支持任何Mac 。因此，如果您使用较旧的 macOS 设备，只要是 2016 或 2017 MacBook Pro、2016 MacBook、2017 i Mac或 2015 5K Retina 27 英寸 i Mac ，您仍然可以使用该功能。
此外，Mac必须运行 macOS Monterey 12.3或更高版本。打开Apple菜单并选择 About This Mac以检查型号和系统软件版本。
检查 iPad 的兼容性
Universal Control需要 iPad Pro（任何一代）或第 6 代 iPad、第 3 代 iPad Air、第 5 代 iPad mini 或更新版本。iPadOS 15.4 或更高版本也是必需的。打开“设置”(Settings)应用并选择“通用(General)” >“关于此 iPad”以检查设备型号和系统软件版本。
3.更新系统软件
如果您使用运行旧版本系统软件的兼容Universal Control 的(Universal)Mac或 iPad，您必须更新到 macOS 12.3 Monterey或 iPadOS 15.4 才能开始使用该功能。安装任何未完成的更新也是一种很好的做法，因为它们通常包含一般增强和错误修复。
更新 Mac
打开Apple菜单并选择关于本Mac > Software Update > Update立即更新。
更新 iPad
打开设置(Settings)应用程序，然后点击General > Software Update > Download并安装(Install)。
无法更新您的Mac或 iPad？了解(Learn)如何修复卡住的 macOS(fix stuck macOS)或iPadOS 更新(iPadOS updates)。
4.检查通用控制选项
接下来，确保Universal Control处于活动状态或在(Universal Control)Mac和 iPad
上设置您想要的方式。
(Check Universal Control Options)检查Mac(Mac)上的通用控制选项
打开Apple菜单并选择System Preferences > Display > Universal Control。然后，选中允许光标和键盘在附近的任何Mac(Mac)或 iPad
之间移动（如果它显示为非活动状态）旁边的复选框。
其他两个选项通过以下方式影响通用控制(Universal Control)，理想情况下应该处于活动状态：
推动(Push)显示器边缘以连接附近的Mac或 iPad — 需要您推动显示器一角的光标以连接到相邻设备。
自动重新连接到附近的任何Mac或 iPad —在范围内时自动
重新连接到设备。(Reconnects)
(Check Universal Control Options)检查iPad 上的
通用控制选项
打开设置(Settings)应用程序，然后点击General > Airplay & Handoff。接下来(Next)，打开键盘(Keyboard)和鼠标(Mouse)( Beta ) 选项（如果它未激活）。
5. 手动连接设备
如果Mac的Universal Control设置中的(Universal Control)自动(Automatically)重新连接到附近的任何Mac或 iPad 选项处于非活动状态，则您必须手动连接到 iPad 才能启动该功能。
为此，请选择控制中心(Control Center)图标并展开显示(Display)。然后，在“将键盘和鼠标
链接(Link)到”部分下选择要连接的设备。
6. 使用相同的 Apple ID
(Universal Control)除非您在Mac(Mac)和 iPad上使用相同的Apple ID或 iCloud 帐户，否则Universal Control将不起作用。如果您有单独的Apple ID(Apple IDs)（例如，供工作和个人使用），请确保这不是问题。
在 Mac 上检查 Apple ID
在Mac(Mac)上打开System Preferences应用并选择Apple ID。您可以在窗口左侧
找到您的Apple ID 。
在 iPad 上查看 Apple ID
打开 iPad 上的“设置”(Settings)应用，然后点击您的头像。您可以在屏幕顶部
找到您的Apple ID 。
您(Are)是否使用了错误的Apple ID？了解(Learn)如何使用正确的 iCloud 帐户登录(sign in with the correct iCloud account)。
7.重新排列显示
Universal Control足够智能，可以自动确定设备的位置，但有时会出错。要检查这一点，请打开Mac上的(Mac)System Preferences应用程序并选择Displays。如果显示的顺序错误，请根据需要拖动它们。
8.检查蓝牙和Wi-Fi
Universal Control使用蓝牙(Bluetooth)和Wi-Fi在(Wi-Fi)Mac和 iPad之间切换。如果您仍然无法使该功能正常工作，请检查两个设备上的蓝牙(Bluetooth)和Wi-Fi模块是否处于活动状态。
在 Mac 上检查蓝牙和 Wi-Fi
打开控制中心(Control Center)。如果蓝牙(Bluetooth)和Wi-Fi图标显示为非活动状态，请选择以激活它们。
在 iPad 上检查蓝牙和 Wi-Fi
(Swipe)从屏幕左上角向下滑动以打开控制中心(Control Center)。如果蓝牙(Bluetooth)和Wi-Fi图标显示为非活动状态，请点击以激活它们。
9.检查切换
除了蓝牙和Wi-Fi ， Universal Control还需要Handoff进行通信。如果该功能未激活，请启用该功能。
在 Mac 上检查接力
打开Apple菜单并选择System Preferences。然后，选择常规(General)并激活允许(Allow Handoff)在此Mac和您的 iCloud 设备之间切换选项。
在 iPad 上检查接力
打开设置并点General > AirPlay和接力(Handoff)。然后，打开Handoff(Handoff)旁边的开关。
10.禁用互联网共享(Internet Sharing)和个人热点(Personal Hotspot)
Internet 共享(Internet Sharing)和个人热点(Personal Hotspot)是可能干扰Mac和 iPad上的Universal Control的两个功能。(Universal Control)禁用它们并检查是否有影响。
在 Mac 上禁用 Internet 共享
打开系统偏好设置(System Preferences)应用程序，选择共享，然后取消选中(Sharing)Internet 共享(Internet Sharing)旁边的框。
在 iPad 上禁用个人热点
打开设置(Settings)应用，点击个人热点(Personal Hotspot)，然后关闭个人热点(Personal Hotspot)旁边的开关。
11.重启网络设置
如果上述修复均无济于事，您必须重置Mac和 iPad 上的网络设置。这应该可以解决阻止设备通信的
任何损坏的蓝牙或 Wi-Fi 配置。(Bluetooth)
在 Mac 上重置网络设置
打开Finder，在菜单栏上选择Go > Go to Folder，然后访问以下文件夹：
/图书馆/首选项/
然后，将下面的文件拖入垃圾箱(Trash)。
com.apple.Bluetooth.plist
接下来，访问以下文件夹：
/库/首选项/系统配置/
然后，将下面的文件拖入垃圾箱(Trash)。
com.apple.airport.preferences.plist
com.apple.network.identification.plist
com.apple.network.eapolclient.configuration.plist
com.apple.wifi.message-tracer.plist
网络接口.plist
首选项.plist
最后，重新启动您的 Mac。
重要提示：如果您之后遇到任何与网络相关的问题，请从垃圾箱(Trash)中恢复上述文件。
在 iPad 上重置网络设置
打开“设置”(Settings)应用，然后点击“General > Transfer和重置(Reset)iPhone > Reset > Reset Network Settings。接下来(Next)，输入您的设备密码和屏幕时间(Screen Time)密码。点击重置以确认。
完全控制
Universal Control是Mac和 iPad 上的一项便捷功能，因此花时间让它正常工作是值得的。但是，与任何与软件相关的事情一样，您可以通过使两台设备上的系统软件保持最新来最大限度地减少出现进一步问题的机会。
Universal Control Not Working on Mac and iPad? Try These 11 Fixes
Doeѕ Universal Control fail to kick in on уour Mac and iPad? Compatibility issues, feature limitations, and incorrectly configured settings often сause that.
Go through the suggestions and solutions below to get the Universal Control feature working on your Mac and iPad again.
1. Restart the Devices
If you could use Universal Control without issue until just a moment ago, try restarting your Mac and iPad. That should eliminate any software-related glitches preventing the feature from working.
Restart Mac
Open the Apple menu and select Restart. Then, clear the box next to Reopen windows when logging back in and choose Restart again.
Restart iPad
Open the Settings app and tap General > Shut Down. Next, drag the Power slider to the right, wait for 30 seconds, and hold down the Top button to reboot the device.
2. Check Devices for Compatibility
Like Sidecar, Universal Control only works on newer Macs and iPads. If you’re attempting to use the feature for the first time, it’s best to check your devices for compatibility.
Check Mac for Compatibility
Universal Control supports any Mac from 2018 onward. So if you use an older macOS device, you can still expect to use the feature so long as it’s a 2016 or 2017 MacBook Pro, 2016 MacBook, 2017 iMac, or 2015 5K Retina 27-inch iMac.
Additionally, the Mac must run macOS Monterey 12.3 or later. Open the Apple menu and select About This Mac to check the model and system software version.
Check iPad for Compatibility
Universal Control requires an iPad Pro (any generation) or a 6th-generation iPad, 3rd-generation iPad Air, 5th-generation iPad mini, or newer. iPadOS 15.4 or later is also a requisite. Open the Settings app and select General > About This iPad to check the device model and system software version.
3. Update System Software
If you use a Universal Control-compatible Mac or iPad running older versions of the system software, you must update to macOS 12.3 Monterey or iPadOS 15.4 to begin using the feature. It’s also good practice to install any outstanding updates regardless since they often contain general enhancements and bug fixes.
Update Mac
Open the Apple menu and select About This Mac > Software Update > Update Now.
Update iPad
Open the Settings app and tap General > Software Update > Download and Install.
Can’t update your Mac or iPad? Learn how to fix stuck macOS or iPadOS updates.
4. Check Universal Control Options
Next, make sure that Universal Control is active or set up the way you want on your Mac and iPad.
Check Universal Control Options on Mac
Open the Apple menu and select System Preferences > Display > Universal Control. Then, select the checkbox next to Allow your cursor and keyboard to move between any nearby Mac or iPad if it appears inactive.
The two other options affect Universal Control in the following ways and should ideally be active:
Push through the edge of a display to connect a nearby Mac or iPad — Requires that you push the cursor at the corner of the display to connect to the adjacent device.
Automatically reconnect to any nearby Mac or iPad — Reconnects to devices automatically when in range.
Check Universal Control Options on iPad
Open the Settings app and tap General > Airplay & Handoff. Next, turn on the Keyboard and Mouse (Beta) option if it is not active.
5. Manually Connect to the Device
If the Automatically reconnect to any nearby Mac or iPad option is inactive within your Mac’s Universal Control settings, you must manually connect to your iPad to initiate the feature.
To do that, select the Control Center icon and expand Display. Then, choose the device you want to connect under the Link keyboard and mouse to section.
6. Use the Same Apple ID
Universal Control will not work unless you use the same Apple ID or iCloud account on your Mac and iPad. If you have separate Apple IDs (for work and personal use, for example), make sure that’s not an issue.
Check Apple ID on Mac
Open the System Preferences app on your Mac and select Apple ID. You can find your Apple ID to the left of the window.
Check Apple ID on iPad
Open the Settings app on your iPad and tap your profile portrait. You can find your Apple ID at the top of the screen.
Are you using the wrong Apple ID? Learn how to sign in with the correct iCloud account.
7. Rearrange Displays
Universal Control is smart enough to figure the positioning of your devices automatically, but it can sometimes get that wrong. To check that, open the System Preferences app on your Mac and select Displays. If the displays are in the wrong order, drag them around as needed.
8. Check Bluetooth & Wi-Fi
Universal Control uses Bluetooth and Wi-Fi to switch between your Mac and iPad. If you continue to have trouble getting the feature to work, check if the Bluetooth and Wi-Fi modules are active on both devices.
Check Bluetooth and Wi-Fi on Mac
Open the Control Center. If the Bluetooth and Wi-Fi icons appear inactive, select to activate them.
Check Bluetooth and Wi-Fi on iPad
Swipe down from the top left of the screen to open the Control Center. If the Bluetooth and Wi-Fi icons appear inactive, tap to activate them.
9. Check Handoff
Bluetooth and Wi-Fi aside, Universal Control also requires Handoff for communication. Enable the functionality if it’s not active.
Check Handoff on Mac
Open the Apple menu and select System Preferences. Then, select General and activate the Allow Handoff between this Mac and your iCloud devices option.
Check Handoff on iPad
Open Settings and tap General > AirPlay & Handoff. Then, turn on the switch next to Handoff.
10. Disable Internet Sharing and Personal Hotspot
Internet Sharing and Personal Hotspot are two features that can interfere with Universal Control on the Mac and iPad. Disable them and check if that makes a difference.
Disable Internet Sharing on Mac
Open the System Preferences app, select Sharing, and uncheck the box next to Internet Sharing.
Disable Personal Hotspot on iPad
Open the Settings app, tap Personal Hotspot, and turn off the switch next to Personal Hotspot.
11. Restart Network Settings
If none of the fixes above help, you must reset the network settings on your Mac and iPad. That should resolve any corrupt Bluetooth or Wi-Fi configurations preventing the devices from communicating.
Reset Network Settings on Mac
Open Finder, select Go > Go to Folder on the menu bar, and visit the following folder:
/Library/Preferences/
Then, drag the file below into the Trash.
com.apple.Bluetooth.plist
Next, visit the following folder:
/Library/Preferences/SystemConfiguration/
Then, drag the files below into the Trash.
com.apple.airport.preferences.plist
com.apple.network.identification.plist
com.apple.network.eapolclient.configuration.plist
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
preferences.plist
Finally, restart your Mac.
Important: If you encounter any network-related issues afterward, restore the above files from the Trash.
Reset Network Settings on iPad
Open the Settings app and tap General > Transfer & Reset iPhone > Reset > Reset Network Settings. Next, enter your device passcode and Screen Time passcode. Tap Reset to confirm.
In Total Control
Universal Control is a handy feature on the Mac and iPad, so taking the time to get it to work correctly is worth the hassle. However, like with anything software-related, you can minimize the chances of further problems by keeping the system software on both devices up-to-date.
