Although the definition the other user posted was too strong, it was mitigated by the observation that Apple is barely 50%. If we compare Google's marketshare

Although the definition the other user posted was too strong, it was mitigated by the observation that Apple is barely 50%. If we compare Google's marketshare in end user email, video hosting and search, we can see Google is a lot stronger in many markets, than apple is in their best market. (I wish I could use an iPhone, but having to use Mac OS for development is a real turn off, considering how sucky Mac OS, in my view, has ever been.)