Macintosh Business Unit

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Macintosh Business Unit
Type Operating unit of Microsoft
Industry Computer software
Founded January 7, 1997
Headquarters Redmond, Washington, USA
Key people Eric Wilfrid (General Manager)
Products Microsoft Office
Microsoft Messenger
Remote Desktop Client
Revenue $350 million (2008)[1]
Employees 180 (2008)[1]

Macintosh Business Unit (informally known as Mac BU or MacBU) is an operating unit of Microsoft that, as of 2009, is the largest software developer outside of Apple Inc. for the Mac OS operating system.[2] Formed on January 7, 1997 (with release of Mac OS 7.6),[3] it was formerly situated within Microsoft's Specialized Devices and Applications Group inside the Entertainment and Devices Division.,[2][4] and is now inside the Microsoft Office division.


Prior to the Mac BU, Microsoft had developed Macintosh software, starting in 1984 with Word 1.0 for Macintosh. However, with the rise and dominance of Windows in the 1990s, there have been fears that Microsoft might stop developing Macintosh versions of key products, notably Microsoft Office.[citation needed] Thus, Mac BU was established in 1997 with a five-year commitment by Microsoft to continue developing and supporting Macintosh software – a pledge most recently renewed on January 10, 2006 at the Macworld Conference & Expo.[citation needed] Kevin Browne was the Mac BU's first General Manager (GM) and served from its inception through December 18, 2002, at which point Roz Ho served the role from December 18, 2002 to June 8, 2007; after that, Craig Eisler became the GM.[5][6]


Mac BU develops Macintosh versions of Microsoft Office, Microsoft Messenger, and Remote Desktop Client.[7] Previously developed software by the Mac BU include Internet Explorer (development ceased in 2003),[8] Virtual PC,[9] and the MSN for Mac OS X browser (cancelled May 31, 2005).[10]


  1. ^ a b Jon Fortt (March 25, 2008). "Microsoft looks to cash in on the iPhone". Fortune: Big Tech Blog. Retrieved 2008-04-03. 
  2. ^ a b Oliver, Sam (April 2, 2009). "Microsoft optimistic about Office making its way to iPhone". AppleInsider. Retrieved 2010-08-30. 
  3. ^ Microsoft (January 7, 1997). "Microsoft Announces New Macintosh Product Unit". Microsoft press release. Retrieved 2007-02-09. 
  4. ^ "Microsoft 2010 form 10-K". United States Securities and Exchange Commission. 2010-07-30. p. 8. Retrieved 2010-08-05. 
  5. ^ Microsoft (December 18, 2002). "Microsoft Appoints Seasoned Leader as Macintosh Business Unit General Manager". Microsoft press release. Retrieved 2007-02-09. 
  6. ^ Craig Eisler (June 8, 2007). "Hello from the new General Manager of the Macintosh Business Unit - Craig Eisler". Retrieved 2007-06-10. 
  7. ^ "Mac BU Official site". 2010-08-30. Retrieved 2010-08-30. 
  8. ^ Microsoft (October 2006). "Internet Explorer for Mac no longer available for download". Archived from the original on 2007-03-03. Retrieved 2007-03-04. 
  9. ^ Peter Cohen (August 7, 2006). "WWDC: Microsoft kills Virtual PC for Mac". Macworld. Retrieved 2007-03-04. 
  10. ^ Fried, Ina (March 11, 2005). "Microsoft to kill MSN for the Mac". ZDNet. CBS Interactive. Retrieved 2010-08-30. 

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