<ul><li>On May 13, 1991, Apple released System 7, the biggest upgrade to the Mac operating system since 1984.</li><li>System 7 introduced features like true full-time multitasking, aliases (similar to desktop shortcuts), improved file sharing, and collaboration tools.</li><li>Visually, Mac OS 7 brought enhancements like better TrueType fonts, customizable desktop, and more color options.</li><li>System 7 lasted until 1997 before being replaced by System 8, marking the end of the Mac clone era.</li></ul>

Today in Apple history: System 7 debut shakes up the Mac

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