Midori (operating system)

Midori was the code name for a managed code operating system being developed by Microsoft with joint effort of Microsoft Research. It had been reported[2][3] to be a possible commercial implementation of the Singularity operating system, a research project started in 2003 to build a highly dependable operating system in which the kernel, device drivers, and applications are all written in managed code. It was designed for concurrency, and could run a program spread across multiple nodes at once.[4] It also featured a security model that sandboxes applications for increased security.[5] Microsoft had mapped out several possible migration paths from Windows to Midori.[6] The operating system was discontinued some time in 2015, though many of its concepts were rolled into other Microsoft projects.

DeveloperMicrosoft Corporation
Written inM# (custom C# variant)
Working stateDiscontinued[1]
PlatformsIA-32, x86-64, ARM
Kernel typeMicrokernel (Language-based)


The code name Midori was first discovered through the PowerPoint presentation CHESS: A systematic testing tool for concurrent software.[7]

A new reference to Midori was found in a presentation shown during the OOPSLA 2012 conference in October 2012.[8]


  1. Foley, Mary Jo (10 November 2015). "Whatever happened to Microsoft's Midori operating system project?". ZDNet. CBS Interactive.
  2. Foley, Mary Jo (30 June 2008). "Goodbye, XP. Hello, Midori". ZDNet. CBS Interactive.
  3. Marius Oiaga (2008-06-30). "Life After Windows - Microsoft Midori Operating System". Softpedia. Retrieved 2008-07-22.
  4. David Worthington (2008-07-29). "Microsoft's plans for post-Windows OS revealed". SD Times. Archived from the original on November 16, 2012.CS1 maint: unfit url (link)
  5. David Worthington (2008-08-05). "Microsoft's Midori to sandbox apps for increased security". SD Times. Archived from the original on December 22, 2009.CS1 maint: unfit url (link)
  6. David Worthington (2008-07-31). "Microsoft maps out migration from Windows". SD Times. Archived from the original on July 1, 2013.CS1 maint: unfit url (link)
  7. Madanlal Musuvathi; Shaz Qadeer; Thomas Ball (November 2007). "CHESS: A systematic testing tool for concurrent software". Microsoft. Retrieved 2008-07-22.
  8. Mary Jo Foley. "Microsoft's Midori operating-system skunkworks project soldiers on". ZDnet's All About Microsoft. Retrieved 2012-11-08.

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