iMac 21.5 Polegadas (Meados de 2011)

Display
21.5-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors
Resolution: 1920 by 1080 pixels

Processor
2.5GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache

Memory
4GB (two 2GB) of 1333MHz DDR3 memory
Configurable to 16GB, only at the Apple Online Store.

Storage
500GB (7200 rpm) hard drive

Graphics
AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory

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 17-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 Expansion
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
Slot-loading 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW)
Audio in/out
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
IR receiver