The new Sidecar feature in macOS Catalina extends your Mac’s display to your iPad. With it, you can use your iPad as a secondary monitor or as a mirrored display that works with Apple Pencil and accessories like a mouse and keyboard.

macOS Catalina中的新Sidecar功能可将Mac的显示屏扩展到iPad。 有了它，您可以将iPad用作辅助显示器或与Apple Pencil以及鼠标和键盘等附件一起使用的镜面显示器。

边车的工作原理 (How Sidecar Works)

Once you have macOS Catalina installed on your Mac, you can connect your iPad to your computer and use it as an external display. It works both in a wired and wireless mode.

在Mac上安装macOS Catalina之后 ，就可以将iPad连接到计算机，并将其用作外部显示器。 它可以在有线和无线模式下工作。

If you connect your iPad using a USB-C or Lightning cable, the connection is faster and more stable. But for most users, the wireless connection will work just as well. There’s no major lag as Apple uses its own Wi-Fi-based AirDrop-like peer-to-peer connection.

如果使用USB-C或Lightning电缆连接iPad，则连接更快，更稳定。 但是对于大多数用户来说，无线连接也可以正常工作。 苹果公司使用自己的基于Wi-Fi的类似于AirDrop的点对点连接，因此没有很大的滞后。

Because of the peer-to-peer connection, Sidecar only has a 10-foot range. If you move to another room, you’ll notice lag and then a warning on the screen asking you to move closer to the Mac.

由于点对点连接，Sidecar仅具有10英尺的范围。 如果您移到另一个房间，您会注意到滞后，然后屏幕上出现警告，要求您移近Mac。

If you want to use the iPad as a portable display for a Mac around your house, you should look at Luna Display which works on a Wi-Fi network and has a longer range.

如果要将iPad用作房屋周围Mac的便携式显示器，则应查看可在Wi-Fi网络上使用且范围更长的Luna Display 。

Once Sidecar is enabled, the iPad works as more than just a monitor. You’ll see a sidebar with controls and shortcuts, along with a virtual Touch Bar at the bottom of the screen. You can use touch, Apple Pencil, and a mouse to control the Mac display on your iPad.

启用S​​idecar后，iPad不仅可以用作显示器。 您将在屏幕底部看到带有控件和快捷方式的侧边栏，以及虚拟触摸栏。 您可以使用触摸，Apple Pencil和鼠标来控制iPad上的Mac显示。

While the touch UI does work, it’s not intuitive. If you were hoping that Sidecar would turn the Mac into an iPad where you’ll be able to use your fingers to tap on the screen and move around, alas, this is not it. The UI elements in Mac was quite small for this to work reliably.

尽管触摸UI可以正常工作，但它并不直观。 如果您希望Sidecar可以将Mac变成iPad，在这里您可以用手指点击屏幕并四处移动，,，不是这样。 Mac中的UI元素很小，因此无法可靠地工作。

So when you tap on the screen with a finger or you try to scroll with a finger, nothing happens. You have to use two fingers to scroll. And the only way to click or tap on elements is by using the Apple Pencil or a mouse that’s connected to the iPad (which brings up a cursor on the screen). The Mac’s keyboard and trackpad, of course, works reliably.

因此，当您用手指点击屏幕或尝试用手指滚动时，什么也不会发生。 您必须用两根手指滚动。 单击或点击元素的唯一方法是使用Apple Pencil或连接到iPad的鼠标 (这会在屏幕上显示一个光标)。 Mac的键盘和触控板当然可以可靠地工作。

The Apple Pencil also can’t be used to navigate the UI. It can only be used for clicking and selecting things on the Mac. Apple Pencil does shine when used to draw on the screen in supported apps. This works natively for the Mark Up feature in Preview along with third-party apps like Affinity Photo, Adobe Illustrator, and more.

Apple Pencil也不能用于导航UI。 它只能用于在Mac上单击和选择内容。 在支持的应用程序中，Apple Pencil在屏幕上绘画时不会发光。 此功能可与“ Affinity Photo”，“ Adob​​e Illustrator”等第三方应用程序一起在“预览”中的“ 标记”功能中正常运行。

What this means is that to successfully use Sidecar as a secondary display, you’ll need to get used to a new interaction model. Swipe with two fingers to navigate, click and select using Apple Pencil or a mouse. The new text selection and editing gestures from iOS 13 and iPadOS 13 work here as well.

这意味着要成功将Sidecar用作辅助显示，您需要习惯于新的交互模型。 用两根手指轻扫以导航，单击并使用Apple Pencil或鼠标选择。 iOS 13和iPadOS 13的新文本选择和编辑手势也可以在这里使用。

边车兼容性 (Sidecar Compatibility)

Sidecar feature is supported on the following Macs running macOS Catalina:

在以下运行macOS Catalina的Mac上支持Sidecar功能：

• MacBook Pro introduced in 2016 or later2016年或之后推出的MacBook Pro
• MacBook introduced in 2016 or later2016年或之后推出的MacBook
• MacBook Air introduced in 2018 or laterMacBook Air在2018年或之后推出
• iMac introduced in 2016 or later, plus iMac (Retina 5K, 27-inch, Late 2015)2016年或之后推出的iMac，以及iMac(Retina 5K，27英寸，2015年末)
• iMac ProiMac Pro
• Mac mini introduced in 2018 or later2018年或以后推出的Mac mini
• Mac Pro introduced in 2019Mac Pro于2019年推出

And on the following iPads with Apple Pencil support running iPadOS 13:

在以下支持Apple Pencil且运行iPadOS 13的 iPad上：

• iPad Pro: all modelsiPad Pro：所有型号
• iPad (6th generation) or lateriPad(第6代)或更高版本
• iPad mini (5th generation)iPad mini(第5代)
• iPad Air (3rd generation)iPad Air(第3代)

Before you begin using Sidecar, make sure that both devices are connected to the same Wi-Fi network and that Bluetooth and Wi-Fi are enabled on both devices.

在开始使用Sidecar之前，请确保两个设备都连接到相同的Wi-Fi网络，并且两个设备上都启用了Bluetooth和Wi-Fi。

如何设置Sidecar (How to Setup Sidecar)

The process of connecting to Sidecar is the same for both wired and wireless connections. If you’re going to use the wired connection method, connect the Mac to your iPad using a compatible cable first.

有线和无线连接的连接到Sidecar的过程相同。 如果要使用有线连接方法，请先使用兼容的电缆将Mac连接到iPad。

You can start the Sidecar connection in a couple of ways. The best way is to use the AirPlay option in the menu bar.

您可以通过两种方式启动Sidecar连接。 最好的方法是使用菜单栏中的AirPlay选项。

If you can’t spot the AirPlay icon in the menu bar, you can enable it by going to System Preferences > Displays and checking the “Show mirroring options in the menu bar when available” option.

如果您无法在菜单栏中找到AirPlay图标，则可以通过转到“系统偏好设置”>“显示”并选中“在菜单栏中显示镜像选项(如果可用)”来启用它。

Now, click on the “AirPlay” button from the menu bar. Here, select your iPad.

现在，从菜单栏中单击“ AirPlay”按钮。 在这里，选择您的iPad。

And that’s it. The Sidecar feature is now enabled and your iPad will start working as an external display. You can now drag and drop windows from your Mac’s screen to the iPad.

就是这样。 Sidecar功能现已启用，您的iPad将开始作为外部显示器工作。 现在，您可以将窗口从Mac的屏幕拖放到iPad。

Alternatively, you can also go to System Preferences > Sidecar and then click on the “Select Device” dropdown and select your iPad from the list. Sidecar should now run on your iPad.

或者，您也可以转到系统偏好设置> Sidecar，然后单击“选择设备”下拉菜单，然后从列表中选择iPad。 Sidecar现在应该可以在iPad上运行。

如何使用和自定义Sidecar (How to Use and Customize Sidecar)

While you can simply use the iPad as a secondary monitor, there are some specific controls in macOS to improve your experience.

尽管您可以简单地将iPad用作辅助显示器，但macOS中有一些特定的控件可以改善您的体验。

First of all, you can switch to the mirroring mode to control the Mac from the iPad. This can be useful while remaining in the room but not sitting at the computer.

首先，您可以切换到镜像模式以从iPad控制Mac。 留在房间里而不坐在电脑旁时，这很有用。

To do this, click on the “Sidecar” button from the menu bar after the iPad is connected. Then click on “Mirror Built-in Retina Display.”

为此，在连接iPad后，单击菜单栏中的“ Sidecar”按钮。 然后点击“镜像内置视网膜显示屏”。

The Sidecar UI on the iPad is quite simple. You’ll see a sidebar on the right and a virtual Touch Bar on the bottom (even if your Mac doesn’t support Touch Bar).

iPad上的Sidecar UI非常简单。 您会在右侧看到一个侧边栏，在底部看到一个虚拟的Touch Bar(即使您的Mac不支持Touch Bar)。

On the top of the sidebar, you’ll find options to show or hide the menu bar and the Dock so you can enable full-screen mode on the Mac.

在侧栏的顶部，您将找到显示或隐藏菜单栏和Dock的选项，以便可以在Mac上启用全屏模式。

In the middle, you’ll find your modifier keys: Command, Option, Control, and Shift. You can double-tap on a key to lock it.

在中间，您可以找到修改键：Command，Option，Control和Shift。 您可以点按两次以锁定它。

At the bottom, you’ll see the Undo, Keyboard, and Disconnect options.

在底部，您将看到“撤消”，“键盘”和“断开连接”选项。

The “Keyboard” button brings up iPadOS’s compact floating keyboard which supports gesture typing. You can use the “Disconnect” button to end the Sidecar connection.

“键盘”按钮调出iPadOS的紧凑型浮动键盘，该键盘支持手势输入 。 您可以使用“断开连接”按钮来终止Sidecar连接。

You can also customize the Sidecar UI found on the iPad. On your Mac, Go to System Preferences > Sidecar.

您还可以自定义iPad上的Sidecar UI。 在Mac上，转到系统偏好设置> Sidecar。

From here, use the drop-down next to “Show Sidebar” to move the Sidebar from the left to right. You can also move the Touch Bar to the top or bottom from the “Show Touch Bar” option.

在此处，使用“显示侧栏”旁边的下拉菜单将侧栏从左向右移动。 您也可以从“显示触摸条”选项将触摸条移到顶部或底部。

Additionally, you can uncheck the “Show Sidebar” and “Show Touch Bar” options to disable both elements.

此外，您可以取消选中“显示侧栏”和“显示触摸栏”选项以禁用这两个元素。

If you’re an avid Apple Pencil user, you can also check the “Enable double tap on Apple Pencil” option to use the double-tap gesture as a right-click option on the Mac.

如果您是Apple Pencil的狂热用户，则还可以选中“在Apple Pencil上启用双击”选项，以将双击手势用作Mac上的右键单击选项。

To Disconnect Sidecar, select the “Disconnect” button from the bottom-right or left corner (depending on your preferences) of the iPad’s screen.

要断开Sidecar的连接，请从iPad屏幕的右下角或左下角(取决于您的偏好)中选择“断开连接”按钮。

Alternatively, you can go to the “AirPlay” menu from the menu bar on your Mac and click on the “Disconnect” button.

或者，您可以从Mac上的菜单栏中转到“ AirPlay”菜单，然后单击“断开连接”按钮。

翻译自: https://www.howtogeek.com/443488/how-to-use-your-ipad-as-an-external-mac-display-with-sidecar/