There wasn't great news for Mac enthusiasts in Apple's latest quarterly earnings report - Mac sales are actually down year over year. Apple sold 3.952 million Macs this past quarter, compared to 4.017 million for the same quarter a year ago.

Putting a positive spin on the news, Apple CFO Peter Oppenheimer noted during the conference call with analysts that while Mac sales are down 2 percent year over year, the rest of the PC industry is faring worse - sales are down 14 percent year over year, according to a report from IDC.

Even though unit sales are down, revenue is up - Apple raked in $5.447 billion in Mac sales for the quarter, compared to $5.073 for the same quarter a year ago. So while Apple may not have sold as many Macs, it made more money on them. Tim Cook attributes the difference to strong demand in iMac sales; no surprise, given that the supply of new, thin iMac models was constrained until the beginning of the year.