Segun los datos que recopila Wikipedia (por ejemplo)
Microsoft Windows tiene un porcentaje superior al 90% del mercado en promedio ... y tambien en
Mac OS X:
"Compared to the volume of the market of operating systems, the
market share of Mac OS X, albeit the second largest, has always been relatively small. According to Net Applications, as of the end of 2008,
one computer in ten were macintosh, presumably running Mac OS X (credited as "Mac"). However, according to the W3Counter and the XitiMonitor website, for 2008 the share credited to the operating system was one in twenty and one in twenty-five respectively. As a mean of comparison, the largest share in this market is hold by the
Microsoft Windows operating system,
running on approximatively 9 computers out of 10. Furthermore, while
the market share of Mac OS X has been growing on average, its growth is
slower than, for example,
Windows Vista, both of which competes to replace Windows XP."