System 7 Released (opens in new tab)

May 13, 1991 The System 7 operating system for the Macintosh is released, the second major upgrade to the Mac OS since 1984. One of the major features included in System 7 is built-in cooperative multitasking. System 7 also introduces the concept of “aliases”, which will later be copied as “shortcuts” in Microsoft Windows 95. System… System 7 Released is original content of This Day in Tech History.