The phrase identifies a pre-release version of Apple’s operating system for its mobile devices, made available to developers and select users for testing purposes. This operational system is intended for iPhones and iPads. This version allows for the early assessment of new features, bug identification, and overall system stability before a wider public rollout.
Such releases are crucial in the software development lifecycle. They provide valuable feedback, enabling refinement and optimization prior to general availability. This process helps mitigate potential issues, enhance user experience, and ensure a more stable and reliable final product. Historically, these pre-release programs have been instrumental in delivering polished and well-received operating system updates.