[Bush2000]

Considering that Macs are easier to use, more secure by design, include lots of useful bundled software, and are and less vulnerable to viruses and worms, it's exactly the average user who needs them

You're missing the point: The average user won't pay the Mac tax just to get a computer. And so it goes ... Mac ... also-ran ...

[antiRepublicrat]

The average user won't pay the Mac tax just to get a computer.

Yet they are. Apple sales are up quite a bit. It's been hard to overcome their dark ages where mainly Mac faithful bought them, so market percentages will rise slowly.