This error message indicates a problem encountered when attempting to run an iOS application within the simulator environment on a macOS system. It signifies that the development tools are unable to locate or access any available iOS virtual devices configured within the simulator application. An example scenario where this arises is after a software update, or when the simulator’s device list becomes corrupted or empty.
The appearance of this message halts the intended execution of testing or development workflows. It impacts productivity by preventing developers from quickly iterating on code and verifying functionality across different iOS versions and device types within the controlled simulation environment. Historically, this type of issue often necessitated time-consuming troubleshooting steps involving simulator resets, Xcode updates, or manual device configuration.
