Too many.
Not enough.
In 2009 Apple estimated that the number of users running Mac OS X was around 75 million. Given the longevity of Apple hardware it can be assumed that there are a sizeable number of users still running classic versions of Mac OS so there could be up to 100 million or more Macs in use worldwide.
Less than 10%.
Picasa and IPhoto are two different programs. Picasa will work on a Dell, but many Mac users have problems with it. IPhoto will work on a Mac, but many Dell users can't use it.
too few
Parallels Desktop for Mac is a software package for Mac users to run Windows applications on their computers. This package is available from Amazon and many others
According to an analyst survey in March 2007, the estimated installed user base of Mac OS X is approximately 22 million users (source linked below). That number presumably does not include pre-Mac OS X (Mac OS 9 or earlier) users.
10
Too many. Not enough.
about 7 billion.
When online, it doesn't really matter whether you are a mac users or windows user.
NOW, go and check out the website! IMVU is now available forr MAC :)
There are many, most popular for pc/mac users is Microsoft Excel. For mac, it is Numbers, from Apple inc. Or, for free, you can get the whole Openoffice.org suite.
The majority of the reviews for the MAC Paint Pots state that the users have not had trouble with creasing. MAC products are usually a great value for the money.
Use iHaxGamez.