Apple: OS X
Alternative: Microsoft Windows
Internet Explorer is a hot security mess and entire countries are banding together to keep Windows XP not only alive, but secure, yet Windows continues to just bludgeon Apple on desktops and in offices.
Windows 7 and Windows XP are embedded in more than 75% of all personal computers worldwide, according to web metrics firm Net Applications. Add Windows 8 and Vista and that share swells to about 90%. How's OS X doing? All versions combined add up to little more than 7% of the total. That's super awesome if your main competitor is Linux (1.6% living open and easy), but when your latest update is only one percentage point ahead of Windows Vista -- the official operating system of people who hate themselves -- no amount of pro-design spin can make that look good.