I’ve retested Sidecar after updating both my MacBook Pro to the current macOS 27 release and my iPad to the current iPadOS 27 release.
When the iPad is connected through Sidecar and set to Use As → Extended Display, macOS does not offer a Rotation control for that display. Compatible conventional external displays do expose rotation options in System Settings → Displays.
Physically rotating the iPad by 90° also leaves the Sidecar display in landscape orientation.
This is consistently reproducible for me:
- Connect the iPad to the Mac using Sidecar.
- Select Use As → Extended Display.
- Open System Settings → Displays and select the iPad.
- Observe that no Rotation control is available.
- Physically rotate the iPad 90° into portrait orientation.
Actual result:
Sidecar remains connected and otherwise functions normally, but the iPad display remains landscape. No 90°/270° Rotation option is available, and physically rotating the iPad does not change the extended-display orientation.
Expected result:
An iPad used as an extended Sidecar display should be able to operate in portrait orientation, either automatically using the iPad’s orientation sensor or through 90°/270° Rotation controls in macOS Displays.
I’ve filed the current issue through Feedback Assistant as FB24897273. I also previously filed the related portrait/full-screen limitation as FB22051066.
Given that iPad natively supports portrait orientation, macOS already supports 90°/270° rotation for external displays, and Sidecar presents the iPad as an extended Mac display, the absence of any portrait option seems like a significant and increasingly conspicuous limitation rather than an inherent hardware constraint.
This is particularly difficult to understand now that macOS/iPadOS 27 have substantially expanded Sidecar interaction. Is there any technical or platform constraint that prevents Sidecar from supporting the iPad’s native portrait orientation? If not, I hope FB24897273 can be considered for the appropriate Sidecar/display engineering team.
I’m happy to provide additional reproduction details or diagnostics if useful.