iPod

In October 2001, Apple introduced its first iPod portable digital audio player. Then iPod started as a 5 gigabyte player capable of storing around 1000 songs. Since then it has evolved into an array of products including the Mini (now discontinued), the iPod Touch, the Shuffle (now discontinued), the iPod Classic (also discontinued), the Nano (now discontinued), the iPhone and the iPad. Since March 2011, the largest storage capacity for an iPod has been 160 gigabytes. Speaking to software developers on June 6, 2005, Steve Jobs said the company's share of the entire portable music device market stood at 76%.

The iPod gave an enormous lift to Apple's financial results. In the quarter ending March 26, 2005, Apple earned US$290 million, or 34¢ a share, on sales of US$3.24 billion. The year before in the same quarter, Apple earned just US$46 million, or 6¢ a share, on revenue of US$1.91 billion.

Moving on from colored plastics and the PowerPC G3

In early 2002, Apple unveiled a completely redesigned iMac, using the G4 processor and LCD display. The new iMac G4 design had a white hemispherical base and a flat panel all-digital display supported by a swiveling chrome neck. After several iterations increasing the processing speed and screen sizes from 15" to 17" to 20" the iMac G4 was discontinued and replaced by the iMac G5 in the summer of 2004.

In 2002, Apple also released the Xserve 1U rack mounted server. Originally featuring two G4 chips, the Xserve was unusual for Apple in two ways. It represented an earnest effort to enter the enterprise computer market and it was also relatively cheaper than similar machines released by its competitors. This was due, in no small part, to Apple's use of Fast ATA drives as opposed to the SCSI hard drives used in traditional rack-mounted servers. Apple later released the Xserve RAID, a 14 drive RAID that was, again, cheaper than competing systems.

In mid-2003, Steve Jobs launched the Power Mac G5, based on IBM's G5 processor. Its all-metal anodized aluminum chassis finished Apple's transition away from colored plastics in their computers. Apple claims this was the first 64-bit computer sold to the general public. The Power Mac G5 was also used by Virginia Tech to build its prototype System X supercomputing cluster, which at the time garnered the prestigious recognition of the third-fastest supercomputer in the world. It cost only US$5.2 million to build, far less than the previous No. 3 and other ranking supercomputers. Apple's Xserves were soon updated to use the G5 as well. They replaced the Power Mac G5 machines as the main building block of Virginia Tech's System X, which was ranked in November 2004 as the world's seventh-fastest supercomputer.

A new iMac based on the G5 processor was unveiled August 31, 2004 and was made available in mid-September. This model dispensed with the base altogether, placing the CPU and the rest of the computing hardware behind the flat-panel screen, which is suspended from a streamlined aluminum foot. This new iMac, dubbed the iMac G5, was the "world's thinnest desktop computer", measuring in at around two inches (around 5 centimeters).

2004, however, was a turning point for Apple. After creating a sizable financial base to work with, the company began experimenting with new parts from new suppliers. As a result, Apple was able to produce new designs quickly over a short amount of time, with the release of the iPod Video, then the iPod Classic, and eventually the iPod touch and iPhone.

On April 29, 2005, Apple released Mac OS X v10.4 "Tiger" to the general public.

Apple's wildly successful PowerBook and iBook products relied on Apple's previous generation G4 architecture, which was produced by Freescale Semiconductor, a spin-off from Motorola. Engineers at IBM had minimal success in making their PowerPC G5 processor consume less power and run cooler but not enough to run in iBook or PowerBook formats. As of the week of October 24, 2005, Apple released the Power Mac G5 Dual that features a Dual-Core processor. This processor contains two cores in one rather than have two separate processors. Apple has also developed the Power Mac G5 Quad that uses two of the Dual-Core processors for enhanced workstation power and performance. The new Power Mac G5 Dual cores run individually at 2.0 GHz or 2.3 GHz. The Power Mac G5 Quad cores run individually at 2.5 GHz and all variations have a graphics processor that has 256-bit memory bandwidth.

Retail store expansion

Initially, the Apple Stores were only opened in the United States, but in late 2003, Apple opened its first Apple Store abroad, in Tokyo's Ginza district. Ginza was followed by a store in Osaka, Japan in August 2004. In 2005, Apple opened stores in Nagoya, the Shibuya district of Tokyo, Fukuoka, and Sendai. Another store was opened in Sapporo in 2006. Apple's first European store opened in London, on Regent Street, in November 2004. A store in the Bullring shopping centre in Birmingham opened in April 2005, and the Bluewater shopping centre in Dartford, Kent opened in July 2005. Apple opened its first store in Canada in the middle of 2005 at the Yorkdale Shopping Centre in North York, Toronto. Later on in 2005 Apple opened the Meadowhall Store in Sheffield and the Trafford Centre Store in Manchester (UK). Recent additions in the London area include the Brent Cross Apple Store (January 2006), the Apple Store in Westfield in Shepherd's Bush (September 2008) and the Apple Store in Covent Garden (August 2010), which is currently the largest store in the world.

Also, in an effort to court a broader market, Apple opened several "mini" stores in October 2004 in an attempt to capture markets where demand does not necessarily dictate a full-scale store. The first of these stores was opened at Stanford Shopping Center in Palo Alto, California. These stores follow in the footsteps of the successful Apple products: iPod mini and Mac mini. These stores are only one half the square footage of the smallest "normal" store and thus can be placed in several smaller markets.

Apple and "i" Web services

In 2000, Apple introduced its iTools service, a set of free web-based tools that included an email account, internet greeting cards called iCards, a service called iReview that gave internet users a place to read and write reviews of Web sites, and a tool called KidSafe that promised to prevent children from browsing inappropriate portions of the web. The latter two services were eventually canceled because of lack of success, while iCards and email became integrated into Apple's .Mac subscription-based service introduced in 2002 and discontinued in mid-2008 to make way for the release of the new MobileMe service, coinciding with the iPhone 3G release. MobileMe, which carried the same US$99.00 annual subscription price as its Mac predecessor, featured the addition of "push" services to instantly and automatically send emails, contacts and calendar updates directly to users' iPhone devices. Some controversy surrounded the release of MobileMe services to users resulting in expected downtime and a significantly longer release window. As a result of this, Apple extended the subscriptions of existing MobileMe subscribers by an additional 30 days free-of-charge.[155] At the WWDC event in June 2011, Apple announced its most up to date cloud service, iCloud, replacing MobileMe. This service kept most of the core services that MobileMe offered, however dropping iDisk, Gallery, and iWeb. Additionally, it added a number of other features to the group, including Find my Mac, iTunes Match, Photo Stream, Documents & Data Backup, and iCloud backup for iOS devices. The service requires users to be running iOS 5 and OS X 10.7 Lion.

iTunes Store

The iTunes Music Store was launched in April 2003, with 2 million downloads in the first 16 days. Music was purchased through the iTunes application, which was initially Macintosh-only; in October 2003, support for Windows was added. Initially, the music store was only available in the United States due to licensing restrictions.

In June 2004 Apple opened its iTunes Music Store in the United Kingdom, France, and Germany. A version for the European Union version opened October 2004, but it was not initially available in the Republic of Ireland due to the intransigence of the Irish Recorded Music Association (IRMA) but was opened there a few months later on Thursday, January 6, 2005. A version for Canada opened in December 2004. On May 10, 2005, the iTunes Music Store was expanded to Denmark, Norway, Sweden, and Switzerland.

On December 16, 2004, Apple sold its 200 millionth song on the iTunes Music Store to Ryan Alekman from Belchertown, Massachusetts. The download was The Complete U2, by U2. Just under three months later Apple sold its 300 millionth song on March 2, 2005. On July 17, 2005, the iTunes Music Store sold its 500 millionth song. At that point, songs were selling at an accelerating annualized rate of more than 500 million.

On October 25, 2005, the iTunes Store went live in Australia, with songs selling for A$1.69 each, albums at (generally) A$16.99 and music videos and Pixar short films at A$3.39. Briefly, people in New Zealand were able to buy music off the Australian store. However, that loophole was quickly closed.

On February 23, 2006, the iTunes Music Store sold its 1 billionth song.

The iTunes Music Store changed its name to iTunes Store on September 12, 2006, when it began offering video content (TV shows and movies) for sale. Since iTunes' inception, it has sold over 2 billion songs, 1.2 billion of which were sold in 2006. Since downloadable TV and movie content was added 50 million TV episodes and 1.3 million movies have been downloaded.

In early 2010, Apple celebrated the 10 billionth song downloaded from the iTunes Music Store.

Intel transition

In a keynote address on June 6, 2005, Steve Jobs officially announced that Apple would begin producing Intel-based Macintosh computers beginning in 2006. Jobs confirmed rumors that the company had secretly been producing versions of its current operating system Mac OS X for both PowerPC and Intel processors over the past 5 years, and that the transition to Intel processor systems would last until the end of 2007. Rumors of cross-platform compatibility had been spurred by the fact that Mac OS X is based on OpenStep, an operating system that was available for many platforms. In fact, Apple's own Darwin, the open source underpinnings of Mac OS X, was also available for Intel's x86 architecture.

On January 10, 2006, the first Intel-based machines, the iMac and MacBook Pro, were introduced. They were based on the Intel Core Duo platform. This introduction came with the news that Apple would complete the transition to Intel processors on all hardware by the end of 2006, a year ahead of the originally quoted schedule.