Apple’s Mac sales are down seven percent year over year for the full September quarter, according to a new report from Piper Jaffray analyst Gene Munster who looked at September data from market research firm NPD. Based on the data, Munster suggests that U.S. Mac sales in the month of September were down 14 percent year over year, as during the July to August period, sales were down just three percent but dropped to seven percent down for the overall quarter. We have analyzed domestic NPD retail data for the full September quarter which suggests Mac sales are tracking down 7% y/y. We note that the September data suggested the last month of the quarter was down 1
