System 7

<p>System 7 (later named Mac OS 7) is the seventh major release of the <a href="/facts/Classic_Mac_OS/I5fQq44K">classic Mac OS</a> <a href="/facts/Operating_system/8XTuvMh2">operating system</a> for <a href="/facts/Mac_(computer)/8GhnXTK0">Macintosh</a> computers, made by <a href="/facts/Apple_Inc./oTJYta3k">Apple Computer</a>. It was launched on May 13, 1991, to succeed <a href="/facts/System_6/5hKYcxEV">System 6</a> with <a href="/facts/Virtual_memory/Lw2GemF5">virtual memory</a>, personal <a href="/facts/File_sharing/7GISy0GJ">file sharing</a>, <a href="/facts/QuickTime/rA3GQp2j">QuickTime</a>, <a href="/facts/TrueType/6kBap0kH">TrueType</a> fonts, the <a href="/facts/Force_Quit/PjqmLTUR">Force Quit</a> dialog, and an improved user interface.
</p><p>It was <a href="/facts/Codename/MRq0mo4b">code-named</a> "Big Bang" in development and the initial release was named "The System" or "System" like all earlier versions. With version 7.5.1, the name "Mac OS" debuted on the boot screen, and the operating system was officially renamed to Mac OS in 1997 with version 7.6. The Mac OS 7 line was the longest-lasting major version of the Classic Mac OSes due to the <a href="/facts/Development_hell/6lLPVoU5">troubled development</a> of <a href="/facts/Copland_(operating_system)/vz2aDNhl">Copland</a>, an operating system intended to be the successor to OS 7 before its cancellation and replacement with <a href="/facts/Mac_OS_8/Vde5S5hl">Mac OS 8</a>.
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System 7 open-in-new

System 7