Size and weight

21.5-inch iMac

27-inch iMac

Connections and expansion

• One FireWire 800 port; 7 watts
• Four USB 2.0 ports
• SD card slot

Communications

• Built-in AirPort Extreme 802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible
• Built-in Bluetooth 2.1 + EDR (Enhanced Data Rate)
• Built-in 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)

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 Stereo Headset with microphone

Display

• Built-in 21.5-inch (viewable) or 27-inch (viewable) LED-backlit glossy widescreen TFT active-matrix liquid crystal display with IPS technology
• Resolution
  • 21.5-inch models: 1920 by 1080 pixels
  • 27-inch models: 2560 by 1440 pixels
• 16:9 aspect ratio
• Millions of colors at all resolutions
• Typical viewing angle: 178° horizontal; 178° vertical
• Typical brightness: 320 cd/m2 (21.5-inch models); 375 cd/m2 (27-inch models)
• 27-inch model can be attached to a wall mount, articulating arm, or other VESA-compliant mounting solution using the optional VESA Mount Adapter Kit

Graphics and video support

• 21.5-inch models, one of the following:
  • NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory3
  • ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory
• 27-inch model with dual-core processor, one of the following:
  • ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory
  • ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory
• 27-inch model with quad-core processor:
  • ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory
• Built-in iSight camera
• Mini DisplayPort output port with support for DVI, VGA, and dual-link DVI (adapters sold separately). 27-inch models also support input from external DisplayPort sources (adapters sold separately).
• Support for extended desktop and video mirroring modes
• 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

Software

• Mac OS X v10.6 Snow Leopard (includes iTunes, Time Machine, Quick Look, Spaces, Spotlight, Dashboard, Mail, iChat, Safari, Address Book, QuickTime, iCal, DVD Player, Photo Booth, Front Row, Xcode Developer Tools)
• iLife ’09 (includes iPhoto, iMovie, iDVD, iWeb, GarageBand)

Processor and memory

• 21.5-inch and 27-inch models, one of the following:
  • 3.06GHz Intel Core 2 Duo processor with 3MB shared L2 cache
  • 3.33GHz Intel Core 2 Duo processor with 6MB shared L2 cache
• 27-inch models only, one of the following:
  • 2.66GHz quad-core Intel Core i5 processor with 8MB shared L3 cache; Turbo Boost dynamic performance up to 3.2GHz
  • 2.8GHz quad-core Intel Core i7 processor with 8MB shared L3 cache; Turbo Boost dynamic performance up to 3.46GHz; Hyper-Threading for up to eight virtual cores
• 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; four SO-DIMM slots support up to 16GB

Storage4

• 21.5-inch models:
  • 500GB or 1TB 7200-rpm Serial ATA hard drive
  • Optional 2TB 7200-rpm Serial ATA hard drive
• 27-inch models:
  • 1TB 7200-rpm Serial ATA hard drive
  • Optional 2TB 7200-rpm Serial ATA hard drive

  

Optical Drive

• Slot-loading 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
  • Writes DVD+R DL and DVD-R DL discs at up to 4x speed
  • Writes DVD-R and DVD+R discs at up to 8x speed
  • Writes DVD-RW discs at up to 6x speed and DVD+RW discs at up to 8x speed
  • Reads DVDs at up to 8x speed
  • Writes CD-R discs at up to 24x speed
  • Writes CD-RW discs at up to 16x speed
  • Reads CDs at up to 24x speed

Electrical and operating requirements

• Line voltage: 100-240V AC
• Frequency: 50Hz to 60Hz, single phase
• Maximum continuous power: 241W (21.5-inch models); 365W (27-inch models)
• Operating temperature: 50° to 95° F (10° to 35° C)
• Storage temperature: -4° to 116° F (-20° to 47° C)
• Relative humidity: 5% to 95% noncondensing
• Maximum altitude: 10,000 feet
• Typical acoustical performance
  • Sound pressure level (operator position): 18 dBA at idle6