Manufacturers ensure compatibility with third-party peripherals through a combination of standardized protocols, rigorous testing, and collaboration with developers. By adhering to industry-wide standards like USB, Bluetooth, or PCIe, they create a common framework for interoperability. Extensive testing is conducted to verify that peripherals function correctly across different devices and operating systems. Some manufacturers also provide software development kits (SDKs) or APIs to help third-party developers optimize their products. Additionally, certification programs and partnerships further enhance compatibility, ensuring seamless integration for end-users. These efforts collectively reduce friction and improve the user experience in a diverse hardware ecosystem.