For almost a decade since its debut in 1998, the iMac used the PowerPC processor. That changed in January 2006, when Apple switched to Intel technology, claiming that the Intel-based iMac was two to three times faster than the PowerPC-based machine it replaced. The evolution continued next year, when Apple refreshed the iMac and presented it as a 20- and 24-inch machine. The A1224 was the model number for the smaller, 20-inch version. Based on Apple’s OS X operating system, the A1224 was in production from August 7, 2007 to March 7, 2012.
The A1224 appeared at a time when Apple was significantly altering the look of the iMac. Instead of the polycarbonate shell its predecessors used, the new iMac embraced an elegant aluminum form factor that covered the front and sides, and was finished off with a flat glass screen. Apple paired the computer with a sleek aluminum keyboard that was aesthetically inspired by the MacBook. While the earliest batch of Intel iMacs used the Intel Core Duo, the A1224 relied on the Intel Core 2 Duo instead.
Processor and Memory
Like its immediate predecessor, the Intel Core 2 Duo, which had a clock speed range of 2.0 to 2.66 GHz, featured two processors, or “cores,” on a single chip. However, the Core 2 Duo had two notable improvements: support for 64-bit processing, and an increase in Level 2 cache, which was 3MB, 4MB or 6MB. As a result, iMac users could take advantage of 64-bit applications, and a larger L2 cache enabled more data access. The cache enabled speedier access to data than the computer’s random access memory, which was 1GB or 2GB.
Apple offered the iMac A1224 in 160GB, 250GB and 320GB configurations. The hard drive, which used the Serial ATA interface, was rated at 7,200 revolutions per minute. The slot-loading optical drive, which also operated at 7,200 rpm, was called the 8x “SuperDrive.” Made for playing and recording CDs and DVDs, the SuperDrive also supported double-layer DVDs, which could record twice the amount of data of regular discs.
Audio and Video
Sporting a glossy widescreen LCD screen with a resolution of 1,680 by 1,050 pixels, the iMac A1224 used an ATI or nVidia card for graphics and video support. The graphics card shared 128MB or 256MB of the computer’s RAM. For video chats, the A1224 had an iSight camera above the screen. At the sides were stereo speakers, which were bolstered with a 24-watt digital amplifier and accompanied by a built-in microphone.
The iMac A1224 had a digital audio input for plugging in headphones, as well as an output for line-in audio recording. Apple provided a mini-DVI output for supporting an external display, among other video devices. An AirPort Extreme router and Bluetooth 2.0 + EDR technology provided wireless connectivity, while a Gigabit Ethernet port enabled wired computer networking. The A1224 started off with five USB 2.0 and two Firewire ports. However, starting from 2009, Apple added one USB port on each iMac, bringing the total number to six: four on the computer itself, two on the keyboard. The manufacturer also eliminated the Firewire 400 port, thus leaving the faster Firewire 800 version. Also included was a built-in infrared receiver for the Apple Remote.
- Photo Credit Justin Sullivan/Getty Images News/Getty Images
How to Restore iMac Firmware to the Original
The Apple iMac computer runs on both software and firmware. Software programs add functionality to your computer, such as word processing, photo...
What Are the Ports on an iMac?
Apple's iMac desktop has a monitor that is embedded within the case of the computer, so it offers a slim form factor....
Like any computer, an iMac can sometimes experience problems for no reason at all. Sometimes it is a hardware failure, and sometimes...