What is the percentage of MAC users versus the percentage of PC users in the USA?

Hello Jailor,

The recognized value for Macintosh sales in the US is roughly 3
percent. For a few references see
  http://seattletimes.nwsource.com/html/businesstechnology/2001841357_mac22.html
near the bottom, refers to a Gartner report.
  http://maccentral.macworld.com/news/2002/07/03/marketshare/index.php
refers to an IDC report, world wide sales are slightly lower.
  http://news.com.com/2100-1040-1027370.html
another reference to IDC reports.

Let's look at this problem from a couple other ways as well since
there are other factors at work. For example, picking a company such
as Adobe which has roughly 45% Macintosh sales
  http://www.macopinion.com/columns/tangible/01/06/15/
you might infer that for that type of user, the Macintosh users are
much closer to parity to PC users.

Or take out corporate sales at
  http://aroundcny.com/technofile/texts/giz082703.html
to get roughly 10-12% sales for personal use.

There have also been plenty of reports that indicate that Macintosh
systems are used longer than equivalent PC systems - in that case, the
sales would be an underestimate of usage.

For more information on this topic, I suggest searches such as
  macintosh sales percentage
  macintosh market share percentage united states
and similar phrases.

If you need an answer that is a little more focused for one type of
application, please let me know in a clarification request so I can
get that kind of information.

  --Maniac