Five years after Apple introduced Sidecar with macOS Catalinahe gave it a much sought after update. Previously, Sidecar only extended a Mac’s display to one iPad in landscape mode, regardless of where the device is held or mounted.

1. Open system settings, displays
2. Click the plus below the image of your Mac screen
3. The plus sign is a drop-down list listing various devices
4. Find your iPad and select it
5. Look for it Use as section that now appears
6. Choose Extended display in the drop-down list which displays by default Main display

The iPad must be turned on, but it will still appear in the device list even if it isn’t. This is a list of compatible devices associated with the Apple account used on Mac.

Sidecar lets you drag to move an iPad relative to your Mac, but you rotate by physically turning the device

With the Mac and iPad turned on, and Use as set to Extended displayYour Mac’s screen now extends onto the iPad. There is an organization button that lets you set whether the iPad is on the right or left of your Mac’s screen.

This section will display a representation of your two screens side by side. You can only move their position to place them each to the left or right of the other.

But if you physically rotate the iPad, its representation on the Mac’s screen also rotates to portrait mode.

This new feature arrived with macOS Sequoia 15.1. However, at the time of writing, it is not present in the separately produced developer beta for macOS Sequoia 15.2.

This issue will undoubtedly be resolved before macOS Sequoia 15.2 is released to the public. But right now it’s also a bit buggy — sometimes it won’t let you select Extended displayFor example.

Apple has not confirmed when MacOS 15.2 will be made public. However, its main addition to the Mac is Apple Intelligence and Apple has committed to rolling it out over the coming months.