Since IDC and Gartner are not in complete agreement on the numbers (though they’re close), I’ll split the difference and just call it IDC/G.
First, the US…
According to IDC/G, US PC shipments in the last quarter were 16.35M; an increase over last year of 6.5%. Apple Mac shipments in the US were 824K; an increase of 28%. That gives Apple a US market share of 5.04%. Further, Apple’s US growth rate is over four times the US PC rate.
Now, the world…
IDC/G shipments are listed as 60M; an increase over last year of 12.1%. Mac shipments were 1.764M; an increase of 33%. That gives Apple a worldwide market share of 2.94%. And Apple’s worldwide growth rate is nearly three times the worldwide rate.
These are great numbers. More importantly, Apple’s growth rate of ~25% or more has held for many quarters and is likely to continue, but since there’s little reason to believe a similar boost in PC sales is on the horizon — after all, Vista did nothing to spike sales — the Mac should continue to gain market share both domestically and abroad.
Next quarter will likely be a good one for PCs in general because of the back to school season. However, if Apple releases a new iMac (as rumored) and its a good machine, they should get an extra bump to coincide with that seasonal swing.
[UPDATE:] I’m not sure how comfortable I am with the US numbers. Apple’s PDF lists “Americas” as 824K, but this is likely not just the US. Further, the PDF lists retail separately, most of which would be in the US. Finally, on the earnings call Apple states US year over year growth was 32%, higher than the 28% listed for “Americas.” In short, while the worldwide figures are solid and look great, the US numbers may not be quite correct. I’ll update this article as necessary.