Mac OS X is a series of graphical operating systems developed by Apple Inc. for their Macintosh line of computers. Launched in 2001, it introduced a sleek interface and robust performance, combining the stability of UNIX with a user-friendly experience. Over the years, it has evolved through various versions, each enhancing functionality and design. The operating system is known for its seamless integration with other Apple products, such as iPhones and iPads, allowing users to enjoy a cohesive ecosystem. With features like Finder, Spotlight, and Mission Control, Mac OS X provides an intuitive environment for both casual users and professionals alike.