A second screen is one of the best productivity upgrades you can make, and if you own an iPad you may already have one in your bag. Sidecar is Apple’s built-in feature that turns an iPad into an extra display for your Mac — wirelessly or with a cable — so you can keep email, chat, or reference material on the iPad while your main screen stays focused. You can even use an Apple Pencil to draw in Mac apps. This guide covers setup, everyday controls, and the fixes for the errors people hit most often.
Quick Answer
To use an iPad as a second display for your Mac, sign both devices into the same Apple Account, turn on Wi-Fi, Bluetooth, and Handoff, then click the Screen Mirroring icon in the Mac menu bar (or open System Settings and go to Displays) and select your iPad. Choose “Use as separate display” to extend your desktop rather than mirror it. The iPad instantly becomes a second screen that you can drag windows onto, and you can disconnect from the same menu when you finish.
What Sidecar Needs to Work
Sidecar requires a fairly modern Mac and iPad. In general, you need a Mac from 2016 or later running macOS Catalina or later, and an iPad running iPadOS 13 or later — iPad Pro models, iPad (6th generation) or later, iPad mini (5th generation) or later, or iPad Air (3rd generation) or later. Both devices must be signed in with the same Apple Account using two-factor authentication. For a wireless connection they must be within about 10 metres of each other with Wi-Fi, Bluetooth, and Handoff on, and the iPad must not be sharing a cellular connection and the Mac must not be sharing its internet. A USB cable connection works too and keeps the iPad charged. Apple’s Sidecar support page lists exact model requirements.
How to Start Sidecar Step by Step
- Sign in to the same Apple Account on the Mac and the iPad.
- Turn on Wi-Fi and Bluetooth on both devices, and enable Handoff on each.
- On the Mac, click the Control Centre icon in the menu bar, then click Screen Mirroring. On newer macOS versions you can also open System Settings, choose Displays, click the plus menu, and pick the iPad.
- Select your iPad from the list of devices.
- The iPad screen changes to show your Mac desktop. By default it extends your desktop as a separate display.
- Drag any window to the edge of your Mac screen to slide it onto the iPad.
- To stop, open the Screen Mirroring menu again and click the iPad to disconnect, or tap Disconnect on the iPad itself.
If you prefer a cable, connect the iPad with USB, approve the trust prompt if one appears, and follow the same steps. The wired connection is slightly sharper and never suffers from Wi-Fi hiccups.
Arranging the Displays and Using the Sidebar
Open System Settings and go to Displays, then click Arrange to drag the iPad screen to the side where it physically sits — left, right, or even above. This matters, because your pointer crosses between screens at the edge you choose. On the iPad itself, Sidecar shows a sidebar with helpful controls: buttons for the Command and Option keys, an undo button, a keyboard button that brings up an on-screen keyboard, and a disconnect button. A Touch Bar strip can also appear along the bottom of the iPad screen for apps that support it. You can move or hide these in System Settings under Displays by selecting the iPad and adjusting its Sidecar options.
Sidecar pairs nicely with other window tools. Combine it with Stage Manager on the Mac to keep each screen tidy, or use the iPad as the dedicated home for chat and music apps while you work.
Using Apple Pencil With Sidecar
If you have an Apple Pencil, Sidecar lets you point, click, and draw directly in Mac apps. Artists use it to sketch in illustration apps, mark up PDFs, or sign documents with a natural pen instead of a trackpad. Double-tap gestures on the Apple Pencil (2nd generation) work in supported apps for switching tools. Keep the Pencil charged and paired to the iPad — it connects to the iPad, not the Mac, and the iPad passes everything through.
Fixes for Common Sidecar Problems
The iPad does not appear in the list. Check the same Apple Account on both devices, turn Handoff on in both places, and make sure neither device is using a VPN or sharing its connection. Move closer to the Mac and try again, or connect with a cable.
“Unable to connect” or a timeout error. Toggle Wi-Fi and Bluetooth off and on at both ends, restart both devices, and update macOS and iPadOS — version mismatches cause many Sidecar failures.
The picture is blurry or lags. Wireless Sidecar compresses the image. Reduce distance to the router, close other heavy network apps, or switch to a USB cable for a crisp, stable picture.
The iPad shows a black screen but is connected. Disconnect and reconnect, and check Displays settings — the arrangement may place the iPad where you are not looking, or its brightness may be turned down.
Common Mistakes to Avoid
- Mirroring instead of extending. If both screens show the same thing, open Displays settings and choose “Use as separate display” for the iPad.
- Wrong screen arrangement. If the pointer crosses at the wrong edge, fix the layout in the Arrange view.
- Expecting touch to replace the mouse fully. Fingers mostly scroll and tap; precise work is better with the pointer or Pencil.
- Draining the iPad battery. Long wireless sessions use a lot of power. Plug the iPad in or use the cable connection.
Getting More From the Extra Screen
A second display earns its keep when it has a job. Give the iPad a permanent role and Sidecar stops being a novelty: park your email and chat apps there so interruptions stay visible but out of your main workspace; keep a reference document, a style guide, or a video call pinned to it while you work on the Mac’s bigger canvas; or use it as a dedicated preview screen for photos and designs while the editing tools live on the main display. Travellers get the biggest win — a laptop-plus-iPad bag delivers a dual-screen desk in a hotel room or a client’s office with zero extra hardware. If you find the picture over Wi-Fi slightly soft for detailed work, keep a short USB cable in the bag as well: two minutes of setup buys you the sharp, lag-free version of the same setup, and the iPad charges while it works.
Conclusion
Sidecar turns an iPad into a genuinely useful second Mac display in under a minute, with no extra software or subscriptions. Set it up once with the same Apple Account on both devices, arrange the screens to match your desk, and you have extra workspace anywhere — at home, in a café, or while travelling.
Frequently Asked Questions
Can I use Sidecar with a Windows PC?
No. Sidecar is an Apple feature that works only between a Mac and an iPad. Windows users need third-party apps for a similar setup.
Does Sidecar work over USB as well as Wi-Fi?
Yes, and the wired connection is more stable and charges the iPad. You must trust the Mac on the iPad the first time you connect.
Can I use two iPads as displays at once?
No. Sidecar supports one iPad at a time, although you can combine it with a normal external monitor.
Why is there no sound on the iPad during Sidecar?
Sidecar is a display feature — audio keeps playing through the Mac’s selected output, such as its speakers or your headphones.
Does Sidecar work with an iPad signed into a different account?
No. Both devices must share the same Apple Account, which is how Apple keeps the connection private and automatic.
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