How Microsoft lost its edge against Apple

Apple has steadily eroded Microsoft’s lead in global PC and device shipments. PCs may still outsell Macs, but comparing both companies' total device shipments tells a strikingly different story.

In 2013 there were 18.8 times more Windows PCs sold than Macs. This is a reduction in the Windows advantage from about 19.8x in 2012. This decline is mostly due to the more rapid decline in Windows PC shipments relative to the more modest decline in Mac unit shipments. Gartner estimates that about 309 million Windows PCs were shipped, down from 337 million in 2012 (which was down from 344 million in 2011, the year PCs peaked.) I estimate about 16.4 million Macs were shipped in 2013 down from 17 million in 2012.

The history of PC shipments relative to Mac shipments is shown in the following graph:


Graph for How Microsoft lost its edge against Apple

I chose to graph the Mac data as an area with additional areas for iOS devices layered on top.

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