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iMac
COMPARISON

 
 
21.5-inch iMac

27-inch iMac
Display 21.5-inch (diagonal) LED-backlit display with IPS technology; 1920-by-1080 resolution with support for millions of colors 27-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1440 resolution with support for millions of colors
Processor
1.4GHz
dual-core Intel Core i5 processor (Turbo Boost up to 2.7GHz) with 3MB shared L3 cache
2.7GHz
quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 4MB L3 cache
2.9GHz
quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
Configurable to 3.1GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz).
3.2GHz
quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
3.4GHz
quad-core Intel Core i5 processor (Turbo Boost up to 3.8GHz) with 6MB L3 cache

Configurable to 3.5GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz).
Memory
8GB of 1600MHz LPDDR3 onboard memory 8GB (two 4GB) of 1600MHz DDR3 memory

Configurable to 16GB.
8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots

Configurable to 16GB or 32GB.
Storage1
500GB (5400-rpm) hard drive

Configurable to 1TB hard drive, 1TB Fusion Drive, or 256GB of flash storage (SSD).
1TB (5400-rpm) hard drive

Configurable to 1TB Fusion Drive or 256GB or 512GB of flash storage (SSD).
1TB (7200-rpm) hard drive

Configurable to 3TB hard drive, 1TB or 3TB Fusion Drive, or 256GB, 512GB, or 1TB of flash storage (SSD).
Graphics
Intel HD Graphics 5000 Intel Iris Pro Graphics NVIDIA GeForce GT 750M graphics processor with 1GB of GDDR5 memory NVIDIA GeForce GT 755M graphics processor with 1GB of GDDR5 memory NVIDIA GeForce GTX 775M graphics processor with 2GB of GDDR5 memory

Configurable to NVIDIA GeForce GTX 780M with 4GB of GDDR5 memory.
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

Support for Target Display Mode via the Thunderbolt port using a Thunderbolt to Thunderbolt cable (sold separately)
Audio Stereo speakers
Dual microphones
Headphone port
Headphone/optical digital audio output (minijack)
Support for Apple iPhone headset with microphone
Connections and Expansion
Input Apple Wireless Keyboard
Full-size keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys and 4 arrow keys (inverted "T" arrangement)

Magic Mouse
Smooth, seamless Multi-Touch surface with support for simple gestures (scrolling and swiping). Click and double-click anywhere. Ambidextrous construction accommodates left- and right-handed users.
Wireless Wi-Fi
802.11ac Wi-Fi wireless networking;
IEEE 802.11a/b/g/n compatible

Bluetooth
Bluetooth 4.0 wireless technology
Size and Weight
Height: 17.7 inches (45.0 cm)
Width: 20.8 inches (52.8 cm)
Stand depth: 6.9 inches (17.5 cm)
Weight: 12.5 pounds (5.68 kg)2

Height: 20.3 inches (51.60 cm)
Width: 25.6 inches (65.0 cm)
Stand depth: 8 inches (20.3 cm)
Weight: 21 pounds (9.54 kg)2
Electrical and Operating Requirements Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Operating temperature: 50° to 95° F (10° to 35° C)
Relative humidity: 5% to 95% noncondensing
Operating altitude: tested up to 10,000 feet
Limited Warranty and Service Your iMac comes with 90 days of free telephone support and a one‑year limited warranty. Purchase the AppleCare Protection Plan to extend your service and support to three years from your computer’s purchase date. Only the AppleCare Protection Plan provides you with direct telephone support from Apple technical experts and the assurance that repairs will be handled by Apple‑authorized technicians using genuine Apple parts. For more information, visit Apple Support or call 800-823-2775.
Operating System OS X Yosemite
Engineered to take full advantage of your Mac hardware, OS X Yosemite is intuitive and easy to use. It features an elegant design, includes enhancements to the apps you use most, and enables your Mac and iOS devices to work together in amazing ways.
Built-in Apps3


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