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HotSauce (code-named Project X) was experimental software developed by Apple Computer as a sample application of its Meta Content Framework. HotSauce generated a 3D visualization of the contents of an MCF file, for example, a website sitemap. It could also be used to navigate the contents of the user's hard drive.

Apple offered beta versions of HotSauce as a web browser plug-in for the classic Mac OS and Microsoft Windows and a stand-alone application.

HotSauce was never released in a final version and while MCF was adopted by thousands of websites, including Yahoo!,[1] most users saw no point in navigating them in a 3D space. The project was discontinued along with MCF shortly after Steve Jobs' return to the company in 1997.


  1. ^ Liberatore, Karen, Apple's "Meta Content Format" Is Catching On, Macworld, available at Urbigenous

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