NPD
This was pretty interesting; CNet reportsthat according to NPD stats, Apple has 91% of the retail PC sales in the US above $1,000. Now, let’s add the caveats here: That’s retail PCs. Of course, loads of people build their (desktop) PCs from OEM parts rather than buying a prebuilt machine, so it’s safe to say that these sales are almost all going to be laptops, where Apple particularly shines. Also, these are primarily going to be consumer purchases, because businesses tend to buy in bulk and not at retail (excluding the smaller businesses) - again Apple is far more popular in the consumer space than in business (barring the iPhone).