Processor: 2.7GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 6MB L3 cache
Memory: 8GB (two 4GB) of 1600MHz DDR3 memory (Configurable to 16GB)
Storage: 1TB (5400-rpm) hard drive
Display: 21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution with support for millions of colors
Graphics: NVIDIA GeForce GT 640M graphics processor with 512MB of GDDR5 memory
Optical Drive: Sold Separately
Video Support and Camera: FaceTime HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display Support for extended desktop and video mirroring modes
Audio: Stereo speakers, Dual microphones, Headphone port, Headphone/optical digital audio output (minijack), Support for Apple iPhone headset with microphone

Connections and Expansions: SDXC card slot, Four USB 3 ports, Two Thunderbolt ports, Mini Display Port output with support for DVI, VGA, and dual-link DVI (adapters sold separately), 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad (Sold Separately)
Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology

Processor: 2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
Memory: 4GB (two 2GB) of 1333MHz DDR3 memory
Storage: 1TB (7200 rpm) hard drive
Display: 21.5-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors; 1920 by 1080 pixels
Graphics: AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory
Optical Drive: 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW)
Video Support and Camera: FaceTime HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display, Support for extended desktop and video mirroring modes
Audio: Built-in stereo speakers, two internal 20-watt high-efficiency amplifiers, Headphone/optical digital audio output (minijack), Audio line in/optical digital audio input (minijack), Built-in microphone, Support for Apple iPhone headset with microphone
Connections and Expansions: One Thunderbolt port, Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately), One FireWire 800 port (7 watts), Four USB 2.0 ports, SDXC card slot Audio in/out, 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector), IR receiver
Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad
Wireless: Wi-Fi: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth: Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology
In the Box: iMac, Apple Wireless Keyboard, Apple Magic Mouse, Power cord, Printed and electronic documentation

Processor: 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
Memory: 8GB (two 4GB) of 1600MHz DDR3 memory (Configurable to 16GB)
Storage: 1TB (5400-rpm) hard drive
Display: 21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution with support for millions of colors
Graphics: NVIDIA GeForce GT 650M graphics processor with 512MB of GDDR5 memory
Optical Drive: Sold Separately
Video Support and Camera: Face Time HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display Support for extended desktop and video mirroring modes
Audio: Stereo speakers, Dual microphones, Headphone port, Headphone/optical digital audio output (minijack), Support for Apple iPhone headset with microphone

Connections and Expansions: SDXC card slot, Four USB 3 ports, Two Thunderbolt ports, Mini Display Port output with support for DVI, VGA, and dual-link DVI (adapters sold separately), 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad (Sold Separately)
Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology

In the Box: iMac, Apple Wireless Keyboard, Apple Magic Mouse, Power cord

Processor: 2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
Memory: 4GB (two 2GB) of 1333MHz DDR3 memory
Storage: 1TB (7200 rpm)
Display: 27-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors; 2560 by 1440 pixels
Graphics: AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory
Optical Drive: 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW)
Video Support and Camera: FaceTime HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display, Support for extended desktop and video mirroring modes
Audio: Built-in stereo speakers, Two internal 20-watt high-efficiency amplifiers, Headphone/optical digital audio output (minijack), Audio line in/optical digital audio input (minijack), Built-in microphone, Support for Apple iPhone headset with microphone
Connections and Expansions: Two Thunderbolt ports on 27-inch iMac, Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately), One FireWire 800 port (7 watts), Four USB 2.0 ports, SDXC card slot, Audio in/out, 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector), IR receiver
Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad
Wireless: Wi-Fi: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth: Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology
In the Box: iMac, Apple Wireless Keyboard, Apple Magic Mouse, Power cord, Printed and electronic documentation

Processor: 3.1GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
Memory: 4GB (two 2GB) of 1333MHz DDR3 memory
Storage: 1TB (7200 rpm)
Display: 27-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors; 2560 by 1440 pixels
Graphics: AMD Radeon HD 6970M graphics processor with 1GB of GDDR5 memory
Optical Drive: 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW)
Video Support and Camera: FaceTime HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display, Support for extended desktop and video mirroring modes
Audio: Built-in stereo speakers, two internal 20-watt high-efficiency amplifiers, Headphone/optical digital audio output (minijack), Audio line in/optical digital audio input (minijack), Built-in microphone, Support for Apple iPhone headset with microphone
Connections and Expansions: Two Thunderbolt ports on 27-inch iMac, Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately), One FireWire 800 port (7 watts), Four USB 2.0 ports, SDXC card slot, Audio in/out, 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector), IR receiver
Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad
Wireless: Wi-Fi: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth: Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology
In the Box: iMac, Apple Wireless Keyboard, Apple Magic Mouse, Power cord, Printed and electronic documentation

Processor: 2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
Memory: 8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots

Storage: 1TB (7200-rpm) hard drive
Display: 27-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1440 resolution with support for millions of colors
Graphics: NVIDIA GeForce GTX 660M graphics processor with 512MB of GDDR5 memory
Optical Drive: Sold Separately
Video Support and Camera: Face Time HD camera, Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display Support for extended desktop and video mirroring modes
Audio: Stereo speakers, Dual microphones, Headphone port, Headphone/optical digital audio output (minijack), Support for Apple iPhone headset with microphone

Connections and Expansions: SDXC card slot, Four USB 3 ports, Two Thunderbolt ports, Mini Display Port output with support for DVI, VGA, and dual-link DVI (adapters sold separately), 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

Input: Apple Wireless Keyboard, Magic Mouse, Magic Trackpad (Sold Separately)
Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology