US Mac sales were up about 26 percent year-over-year in July, according to new NPD data. The figure is being highlighted by Piper Jaffray analyst Gene Munster, who argues that it puts Apple on track to meet consensus predictions of 4.5 million units for the entire September quarter. "We believe Mac sales benefited from the 7/20 launch of OS X Lion along with refreshed MacBook Airs and Mac minis," according to Munster.
