tvOS is an embedded operating system developed by Apple Inc. It is the software platform that powers Apple TV set-top boxes, specifically starting with the fourth-generation model released in 2015. Derived from Apple's iOS, tvOS brings a similar app-centric experience to the television, allowing users to download and run third-party applications from the tvOS App Store, stream video content, play games, and access various digital media services.

Key features of tvOS include a user-friendly interface optimized for large screens, integration with Apple's ecosystem services like Apple Music, Apple TV+, and iCloud Photos, and support for the Siri remote for voice commands and navigation. It also supports AirPlay for mirroring content from Apple devices and HomeKit for smart home control. Developers can create apps and games for tvOS using the Xcode development environment, leveraging frameworks familiar to iOS developers.

Since its introduction, tvOS has seen continuous updates, bringing new functionalities, performance improvements, and interface refinements. These updates often align with major iOS releases, ensuring a cohesive experience across Apple's device ecosystem. tvOS aims to transform the television into a more interactive and personalized entertainment hub, offering a broad range of content and interactive experiences beyond traditional broadcast television.