Macintosh Business Unit
|Operating unit of Microsoft|
|Founded||January 7, 1997|
|Headquarters||Redmond, Washington, USA|
|Eric Wilfrid (General Manager)|
Remote Desktop Client
|Revenue||$350 million (2008)|
Number of employees
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. Formed on January 7, 1997, it was initially composed of over 100 individuals from the existing cross platform Word, Excel, and PowerPoint teams in Microsoft's Office Division, and grew to 180 people the next year, with the addition of the Internet Explorer for Mac and Outlook Express for Mac teams. In 2000, it moved from the Office Division to the Specialized Devices and Applications Group inside the Entertainment and Devices Division, and is now back inside the Microsoft Office division.
Prior to the creation of the Mac BU, Microsoft had developed Macintosh software, starting in 1984 with Word 1.0 for Macintosh. During the early and mid 1990s, Microsoft's Word, Excel, and Powerpoint teams simultaneously developed Windows and Macintosh versions of these applications, but after releasing Office 97 for Windows, Microsoft decided, in January 1997, to form a separate Macintosh Business Unit to focus on creating applications optimized for the Macintosh platform. In August 1997, as part of a broader partnership agreement with Apple, Microsoft committed to continue developing and supporting Macintosh software for at least 5 more years, renewing this pledge on January 10, 2006 at the Macworld Conference & Expo. Ben Waldman was the Mac BU's founder and first General Manager (GM),  serving from its inception in January 2007 through January 2000, when he was succeeded by Kevin Browne, who served through December 18, 2002, and Roz Ho, who served from December 18, 2002 to June 8, 2007; after that, Craig Eisler became the GM.
Mac BU develops Macintosh versions of Microsoft Office, Microsoft Messenger, and Remote Desktop Client. Previously developed software by the Mac BU include Internet Explorer (development ceased in 2003), Virtual PC, and the MSN for Mac OS X browser (cancelled May 31, 2005).
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