Mac sales were down for the holiday 2012 quarter due to supply constraints on the new iMac models, but NPD Group data is showing that sales are up 14 percent year over year for January and February.
According to Piper Jaffray analyst Gene Munster, that growth is due to improved availability of the all-in-one iMacs that began shipping in November 2012. Munster believes that total global Mac sales for the March quarter will be down 5 percent year over year, but provided some positive spin in saying that there's room for "some slight upside."
Munster noted that iMac sales are less impacted by cannibalization by sales of iPads, so the "vast majority of the y/y unit decline in December was likely supply." Those supply issues were apparently caused by problems with a new screen lamination processed used in the ultra-thin late 2012 iMacs.