If you recently upgraded to the Xcode 27.1 beta to get the iPhone Duo simulator, macOS may still be opening the older Device Hub from Xcode 27 via Spotlight. The older Device Hub can display the simulator but lacks the posture control assets. The Fix: Ensure you explicitly launch the Device Hub bundled inside Xcode 27.1. Right-click your Xcode 27.1 beta app, select Show Package Contents, and navigate to Contents > Applications to find and open the correct Device Hub. Alternatively, open it from the Xcode menu bar via Xcode > Open Developer Tool > Device Hub.