For more information, please refer to the risk factors discussed in Apple's Form 10-K for 2010, Form 10-Q for the first 3 quarters of fiscal 2011 and the Form 8-K filed with the SEC today along with the attached press release. Apple assumes no obligation to update any forward-looking statements or information, which speak as of their respective dates.I'd now like to turn the call over to Apple CEO, Tim Cook, for introductory remarks. Timothy D. Cook Thanks, Nancy. Good afternoon, everyone. This is our first earnings call since the passing of Steve Jobs. The world has lost a visionary, a creative genius and an amazing human being. Steve was a great leader and mentor and inspired everyone at Apple to do extraordinary things. His spirit will forever be the foundation of Apple, and we are dedicated to continuing the amazing work that he loved so much. Only Apple brings together software, hardware and services into such a powerful and integrated experience for our customers. As we move forward, we will continue doing that with relentless focus. I'd like to take this opportunity to express our gratitude for all of the condolences and expressions of support that we have received following Steve's passing. With that, I'd like to turn over the call to Peter to discuss our Q4 results. Peter? Peter Oppenheimer Thank you, Tim. We are very pleased to report record September quarter revenues and earnings. We set a new all-time quarterly record for Mac and iPad sales, and we established a new September quarter record for iPhone sales. We're very proud of these results and with the momentum of our business. Revenue for the quarter was $28.3 billion, representing year-over-year growth of 39%. The year-over-year increase was fueled primarily by strong growth in iPad, Mac and iPhone sales. Operating margin was $8.7 billion, representing 30.8% of revenue. Net income was $6.6 billion, increasing 54% year-over-year and translating to earnings per share of $7.05.
Turning to the details in the quarter. I'd like to begin with our Mac products and services. We established a new all-time quarterly record with sales of 4.89 million Macs, exceeding the previous record set in the last December quarter by 760,000 Macs, representing a 26% increase over the year-ago quarter's results. That is more than 6x IDC's most recently published forecast of 4% growth for the PC market overall in the September quarter. Mac sales increased strongly in each of our operating segments led by Asia-Pacific with growth of 61% year-over-year.The increase in Mac sales was fueled by the very strong growth in MacBook Air as well as the continued strong performance of MacBook Pro. In July, we updated the MacBook Air with the next-generation processors, high-speed Thunderbolt I/O technology and a backlit keyboard. And while the portables represented 74% of the total Mac mix, we also generated record desktop sales in the quarter primarily due to continued strength of iMac. We launched Mac OS X Lion on July 20 and customer response has been tremendous with over 6 million Lion downloads during the September quarter. We began and ended the quarter with between 3 and 4 weeks of Mac channel inventory. Moving to our music products. We sold 6.6 million iPods compared to almost 9.1 million in the year-ago quarter. Though down year-over-year, total iPod sales were ahead of our expectations and iPod touch continue to account for over half of all iPods sold. iPod's share of the U.S. market for MP3 players remains at over 70% based on the latest monthly data published by MPD, and iPod continues to be the top-selling MP3 player in most countries we track based on the latest data published by GFK. We ended the quarter within our target range of 4 to 6 weeks of iPod channel inventory.
The iTunes Store generated record results with revenue in the quarter of almost $1.5 billion. The iTunes catalog continues to grow, and customers have downloaded over 16 billion songs and 650 million TV shows to date. We've also been very pleased with the growing popularity of the iBookstore with over 180 million downloads of iBooks today.Read the rest of this transcript for free on seekingalpha.com