In November, the monitoring body to 89.6 percent of Internet users are using the Windows operating system than in October fell 0.84 percent.
Windows This is the biggest drop in two years.
Apple's Mac OSX operating system in the same period of a larger increase, by the end of last month, the Apple operating system's share of 8.9 percent, in October Apple operating system is also a third higher than the market share of 8% for the month.
Net Applications marketing vice president Vince Vizzaccarro that, Windows and IE market share decline in the use of the browser, he said: "More and more users using the Apple operating system, Firefox and the Safari browser."
The agency also found that, Windows to use the weekend off and will decline because of these users at home and more time online, in which a high proportion of the machines are installed Mac OS X operating system.
In November, Windows XP market share fell 1.81%, Vista grew by 1.16%, Windows 2000 share fell to 1.56 percent last month, Vista's market share for the first time reached 20%, to 20.45 percent.
In the past 12 months, Microsoft's market share fell more than 2%, the Apple operating system, the system is in the same period grew by 1.56 percent.
In addition, the open source Linux operating system is also a small increase in October Linux an increase of 0.71 percent, 0.83 percent reached in November. August and September, Linux market share is higher than 0.9 percent.