Wikimedia is putting up some data. I obtained their agents archive for November 2011.
Total Agents/1000 = 5721270
Windows agents/1000 = 4422128 = 77%
Linux agents/1000 = 173110 = 3%
Mac agents/1000 = 531175 = 9.3%
My queries on the database were rather simple:
SELECT sum( b ) AS count FROM Sheet1 WHERE a LIKE '%Macintosh%'
My search strings were Macintosh, Linux and Windows.
For October, Wikimedia was showing that other OS at 78.38%, Linux at 3.48% and Macintosh at 8.41%. It’s likely my approach is too simple but I bet that other OS has declined a lot in one month. I took just one day to examine, 2011-11-30, the last one. It was a Wednesday so there may have been a few people surfing from work…
I was surprised to see GNU/Linux at the lowest levels since 2010 on W3Schools.com. Even more interesting is a spike in XP. They show it rising 5.7% to 38.5% in one month… I thought to check my data for last week in November.
5.1 agents/1000 = 2159322 = 37.7% consistent with their result. What the Heck is going on here?
As far as I know there is no legal source of new XP machines. Is this more fallout from M$’s campaign against illegal copying, freezing XP in that role or is it more people browsing from work?