If we want to know how all popular OS market shares are, such as Windows, Andriod, iOS, Linux,… etc, we can check two top IT data statistic websites.
1: Net MarketShare:
From this website, we can see Windows has almost 89% market share, Mac OS 8.41%, Linux 2.32%, Chrome OS 0.32%; This is from Desktop platform.
If we check Mobile platform, we can see the No. 1 is Android.
StatCounter gives us an overall data by default. But we can still view market share by platform. On Desktop platform, Windows is still the big brother.