Which operating system was released first?

Mac OS was released first compared to other operating systems. This can be attributed to the fact that Macintosh, the line of personal computers developed by Apple Inc., was introduced in January 1984 with the Macintosh System Software. This groundbreaking operating system, later known as Mac OS, was designed to be user-friendly and featured a graphical user interface, something not commonly found in other operating systems at that time. The release of Mac OS set a new standard in computing, shaping the future of operating systems and serving as an inspiration for the development of other graphical user interfaces.