I don't doubt there are companies all Mac. I am all Mac myself. I just had a guy try and refute that the Mac market share is small. It is 13% to 87%. It is small. Not claiming to understand why, but my guess is that Apple controlling policies are not compatible with most large companies. I also think the forced obsolescence and proprietary nature of Apple products is a large problem also.
The reason the market share is so small has to do with the higher pricing of Macs for so long and largely in part due to the limited availability of software many companies use that has only been available on Windows. Since the introduction of the Intel Macs, this is quickly becoming a thing of the past.
I work for an Apple reseller and we are seeing companies every day switching from Windows to OS X. That 13% will grow quicker and quicker in the coming years. I would love to see what that 13% would look like when you factor in iOS being used by businesses. Many of my customers are replacing their outside force's Windows laptops with iPads.
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LOL, Mac uses don't use them much anymore. Keep in mind, Macs are a SMALL share of the computer marketplace. SMALL!!!
Software is pretty much all digital download now and so is music. People largely either stream or pirate their movies, so I'm not sure what these people you claim are using them are actually using them for.