尽管使用 Sidecar 可以将 iPad 变成Mac 的辅助显示器(secondary display for your Mac using Sidecar)，但它使 iPadOS 设备内部的强大处理器未得到充分利用。这就是Universal Control可以发挥作用的地方。
如果您有兼容Universal Control 的(Universal)Mac和 iPad，您可以将 iPad 用作单独的设备，但可以使用Mac的键盘和鼠标来控制它。您甚至可以使用一组输入设备控制其他Mac 。(Macs)
这个怎么运作
Universal Control支持三种 macOS 和 iPadOS 设备的组合，只要至少有一台Mac混合使用即可。您可以在所有三个屏幕上无缝移动光标——所有设备都运行自己的系统软件——使用相同的鼠标或触控板并使用一个键盘输入文本。
例如，您可以使用与 iMac 配对的妙控键盘(Magic Keyboard)和妙控鼠标或(Magic Mouse)MacBook上的内置键盘和触控板来控制 iPad。同样(Likewise)，如果您在 iPad 上使用外部键盘和鼠标(use an external keyboard and mouse with your iPad)（例如Magic Keyboard w/Trackpad），您可以使用它来控制您的Mac。
Universal Control最好的一点是它需要最少的设置并且不需要额外的软件（除非您必须运行 macOS Monterey 12.3和 iPadOS 15.4 或更高版本）。但是，该功能不适用于 iPhone，您也无法在Android和Windows设备上使用它。
兼容设备
您需要一台运行 macOS 12.3 或更高版本的Mac才能使用Universal Control。但是，该功能仅限于 2018 年以后的Mac台式机和笔记本电脑（英特尔(Intel)和Apple Silicon），以下旧型号除外：
- MacBook Pro（2016 年和 2017 年）
- MacBook（2016 年）
- iMac 和 iMac Pro (2017)
- 5K iMac 视网膜 (2015)
如果您尚未更新Mac，请打开“系统偏好设置”(System Preferences )应用并选择“软件更新”( Software Update ) > “立即更新”(Update Now)。
同样，您必须使用运行 iPadOS 15.4 或更高版本的 iPad。虽然Universal Control适用于所有 iPad Pro机型，但它仅适用于第 6 代 iPad、第 5 代 iPad mini、第 3 代 iPad Air及更新机型。
打开“设置”(Settings)应用并选择“通用(General)” > “软件更新”(Software Update) > “下载并安装(Download and Install )”以根据需要更新 iPadOS。
注意(Note)：Universal Control仅允许您控制使用相同Apple ID或 iCloud 帐户的设备。此外，所有设备都必须启用蓝牙(Bluetooth)、Wi-Fi和Handoff。不过，您不必连接到WiFi热点。
设置通用控制
如果您使用与Universal Control 兼容的Mac和 iPad，并安装了最新的系统软件，请按照以下说明进行操作，以确保按照您想要的方式设置该功能。
通用控制 - Mac(Universal Control – Mac)
打开系统偏好设置(System Preferences)应用程序并选择显示器(Displays)>通用控制(Universal Control)以访问以下通用控制(Universal Control)选项。
- 允许您的光标和键盘在附近的任何 Mac 或 iPad 之间移动(Allow your cursor and keyboard to move between any nearby Mac or iPad)：使Universal Control工作的主要开关。它必须是活跃的。
- 推动显示器边缘以连接附近的 Mac 或 iPad(Push through the edge of a display to connect a nearby Mac or iPad)：这使您可以将光标推到Mac或 iPad 的边缘以启动Universal Control。如果您更喜欢通过菜单栏连接，请清除该框。(Clear)
- 自动重新连接到附近的任何Mac或 iPad：这允许您的Mac或 iPad 在第一次之后相互连接，而无需将光标推到显示器边缘。
万能控制 – iPad(Universal Control – iPad)
打开“设置”(Settings)应用并选择“通用(General)” > “隔空播放和接力”。( AirPlay & Handoff. )然后，打开光标和键盘 (Beta)(Cursor and Keyboard (Beta))旁边的开关。
使用通用控制
(Universal Control)只要 macOS 和 iPadOS 设备在彼此的蓝牙(Bluetooth)范围内，Universal Control就会自动检测它们的位置。例如，您可以将 iPad 放在Mac的左侧，然后将鼠标指针推到(Mac)Mac显示屏的左边缘，使其出现在 iPad 的屏幕上。
您首先会看到相邻设备上出现一个半透明条带作为视觉提示；继续推动，光标会在另一侧弹出。您必须至少与设备的屏幕交互一次，然后才能开始使用键盘。
如果您没有在Mac上启用通过显示器边缘连接附近的 Mac 或 iPad(Push through the edge of a display to connect a nearby Mac or iPad) 通用控制(Universal Control)首选项，请在控制中心或菜单栏中(Control Center or menu bar)选择显示，然后在将(Display)键盘和鼠标链接到( Link keyboard and mouse to)部分下选择一个设备。
您还可以在不实际移动Apple设备的情况下安排它们的位置 — 只需转到“系统偏好设置”(System Preferences ) > “显示器(Displays)”并按照您想要的顺序拖动显示缩略图。
除了使用单个键盘、鼠标和触控板与Mac和 iPad 交互之外，您还可以在它们之间拖放文件。但是，您必须在 iPad 上打开兼容的应用程序才能接收从Mac或其他 iPad 拖动的文件，例如移动图像时的照片(Photos)或文件应用程序。(Files)
你仍然可以使用边车
尽管有Universal Control，但您始终可以恢复使用Sidecar。为此，请打开System Preferences应用程序并选择Displays。然后，打开Add Display下拉菜单并在Mirror 或 extend to(Mirror or extend to)部分下选择您的 iPad。
它只是工作
Universal Control是一项令人难以置信的功能，在Mac和 iPad 上运行得非常好，可帮助您改进工作流程并提高工作效率。使您设备上的操作系统保持最新状态，以确保您在以后利用改进和改进。
How to Use the Universal Control Feature for Mac and iPad
Although it’s possible to turn an iPad into a secondary display for your Mac using Sidecar, it leaves the powerful processor inside the iPadOS device underutilized. That’s where Universal Control can make the difference.
If you have a Universal Control-compatible Mac and iPad, you can use the iPad as a separate device but control it with your Mac’s keyboard and mouse. You can even control other Macs with a single set of input devices.
How It Works
Universal Control supports a combination of three macOS and iPadOS devices so long as there’s at least one Mac in the mix. You can seamlessly move your cursor across all three screens—with all of the devices running their own system software—using the same mouse or trackpad and input text with one keyboard.
For example, you can use the Magic Keyboard and Magic Mouse paired with an iMac or the built-in keyboard and trackpad on a MacBook to control an iPad. Likewise, if you use an external keyboard and mouse with your iPad (such as a Magic Keyboard w/Trackpad), you can use that to control your Mac.
The best thing about Universal Control is that it requires minimal setup and no extra software (except that you must be running macOS Monterey 12.3 and iPadOS 15.4 or later). However, the feature is not available for the iPhone, and you also can’t use it with Android and Windows devices.
Compatible Devices
You need a Mac running macOS 12.3 or later to use Universal Control. However, the feature is limited to Mac desktops and laptops from 2018 onward (both Intel and Apple Silicon), with exceptions to the following older models:
- MacBook Pro (2016 and 2017)
- MacBook (2016)
- iMac & iMac Pro (2017)
- 5K iMac Retina (2015)
If you’ve yet to update your Mac, open the System Preferences app and select Software Update > Update Now.
Likewise, you must use an iPad running iPadOS 15.4 or later. Although Universal Control works on all iPad Pro models, it only works on the 6th generation iPad, the 5th generation iPad mini, the 3rd generation iPad Air, and later.
Open the Settings app and select General > Software Update > Download and Install to update iPadOS if needed.
Note: Universal Control will only allow you to control devices that use the same Apple ID or iCloud account. Additionally, all devices must have Bluetooth, Wi-Fi, and Handoff active. You do not have to connect to a WiFi hotspot, though.
Set Up Universal Control
If you use a Universal Control-compatible Mac and iPad with the latest system software, go through the instructions below to make sure that the feature is set up the way you want.
Universal Control – Mac
Open the System Preferences app and select Displays > Universal Control to access the following Universal Control options.
- Allow your cursor and keyboard to move between any nearby Mac or iPad: The main toggle that makes Universal Control work. It must be active.
- Push through the edge of a display to connect a nearby Mac or iPad: This allows you to push the cursor to the edge of the Mac or iPad to initiate Universal Control. Clear the box if you prefer connecting via the menu bar.
- Automatically reconnect to any nearby Mac or iPad: This allows your Mac or iPad to connect to each other after the first time without you having to push the cursor against the edge of the display.
Universal Control – iPad
Open the Settings app and select General > AirPlay & Handoff. Then, turn on the switch next to Cursor and Keyboard (Beta).
Use Universal Control
Universal Control automatically detects the positioning of macOS and iPadOS devices as long as they are within Bluetooth range of each other. For example, you can place your iPad to the left of your Mac and push the mouse pointer at the left edge of the Mac’s display to make it appear on the iPad’s screen.
You will first see a translucent strip appear on the adjacent device as a visual cue; keep pushing, and the cursor will pop on the other side. You must interact with the screen of a device at least once before you can also begin using your keyboard.
If you do not have the Push through the edge of a display to connect a nearby Mac or iPad Universal Control preference active on your Mac, select Display in the Control Center or menu bar and pick a device under the Link keyboard and mouse to section.
You can also arrange the positioning of your Apple devices without physically moving them—just go to System Preferences > Displays and drag the display thumbnails in the order you want.
Aside from interacting with your Mac and iPad with a single keyboard, mouse, and trackpad, you can drag and drop files between them. However, you must have a compatible app open on your iPad to receive files you drag from a Mac or another iPad—e.g., Photos or the Files app when moving images.
You Can Still Use Sidecar
Despite having Universal Control, you can always revert to using Sidecar. To do that, open the System Preferences app and select Displays. Then, open the Add Display pull-down menu and select your iPad under the Mirror or extend to section.
It Just Works
Universal Control is an incredible feature that works exceptionally well on the Mac and iPad, helping you improve your workflow and be more productive. Keep the operating systems on your devices up to date to ensure that you take advantage of improvements and refinements further down the road.
