Piper Jaffray analyst Gene Munster has released a new report covering the full June quarter Mac and iPod sales data from market research firm NPD. According to the data, Apple's Mac sales came in down 5% year over year, despite the introduction of the newest Haswell-based MacBook Airs at this year's WWDC. During the same time period last year, Apple unveiled both upgraded MacBook Airs and the new Retina MacBook Pro, so it seems the lack of a refreshed MacBook Pro lineup may have impacted sales for the quarter. As with his previous reports, Munster notes that it remains difficult to extrapolate NPD data to Apple's global sales performance, but he views the June data as “neutral to slightly negative,” down from slightly positive in a