According to NetMarketShare, a website that tracks trends of operating system and web browser usage throughout the Internet, Mountain Lion, as of December 2012, has replaced its predecessor, OS X Lion, as the most popular Mac operating system. Reportedly, 32% of all Macs that are online are using the Mountain Lion operating system. It may also be interesting to note that although Lion was released after Snow Leopard, Snow Leopard currently is being used about 1% more than Lion. This is most likely attributed to the fact that Snow Leopard was, for a long time, such a strong and stable build of Mac OS X.

Here’s how the three Mac operating systems mentioned above stand:

Mountain Lion is in the lead at 32% market share. In December 2012, Lion lost 2% market share, dropping from 30% 28%. Snow Leopard, comparatively, lost 1% market share, from 30% to 29%. Cumulatively, these two factors helped drive Mountain Lion to the top. 

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