iMac (27-inch, Mid 2011) - Technical Specifications


  • 27-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors

  • Resolution: 2560 by 1440 pixels


  • 2.7GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache

  • 3.1GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache

    • Configurable to 3.4GHz quad-core Intel Core i7, only at the Apple Online Store.


4GB (two 2GB) of 1333MHz DDR3 memory

Configurable to 16GB, only at the Apple Online Store.


  • 2.7 GHz

    • 1TB (7200 rpm) hard drive

    • Configurable to 2TB hard drive or 256GB solid-state second drive, only at the Apple Online Store.

  • 3.1 GHz

    • 1TB (7200 rpm) hard drive

    • Configurable to 2TB hard drive or 256GB solid-state second drive, only at the Apple Online Store.


  • 2.7 GHz

    • AMD Radeon HD 6770M graphics processor with 512MB of GDDR5 memory

  • 3.1 GHz

    • AMD Radeon HD 6970M graphics processor with 1GB of GDDR5 memory

    • Configurable to AMD Radeon HD 6970M with 2GB GDDR5, only at the Apple Online Store.

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


  • 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

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  • Two Thunderbolt ports

  • 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


  • Apple Wireless Keyboard

    • Full-size keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys, 4 arrow keys (inverted “T” arrangement), and embedded numeric keypad

  • 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.

  • Magic Trackpad

    • Solid-state scrolling trackpad for precise cursor control; supports inertial scrolling, pinch and expand, swipe, three-finger swipe, four-finger swipe, tap, double-tap, rotate, screen zoom, scroll, click and drag, click drag and lock, secondary click A and B


  • Wi-Fi

    • 802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible

  • Bluetooth

    • Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology

Size and Weight

  • Height: 20.4 inches (51.7 cm)

  • Width: 25.6 inches (65.0 cm)

  • Depth: 8.15 inches (20.7 cm)

  • Weight: 30.5 pounds (13.8 kg)3

Electrical and Operating Requirements

  • Line voltage: 100-240V AC

  • Frequency: 50Hz to 60Hz, single phase

  • Maximum continuous power: 310W

  • 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 idle4

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.

Environmental Status Report

iMac is designed with the following features to reduce its environmental impact:

  • Arsenic-free display glass

  • BFR-free

  • PVC-free5

  • Mercury-free LED-backlit display

  • Highly recyclable aluminum and glass enclosures

  • Meets ENERGY STAR 5.2 requirements

  • Rated EPEAT Gold6

Apple and the Global Environment

Learn more about Apple’s dedication to reducing the environmental impact of our products and process. The Apple Product Environmental Specification details the environmental attributes of our products.

Acoustic Performance

DECLARED NOISE EMISSIONS in accordance with ISO 9296

Sound Power Level

LWAd (B)

1 B = 10 dB

Sound Pressure Level

Operator Position

LpAm (dB)

2.7 GHz

3.1 GHz

2.7 GHz

3.1 GHz






Hard drive accessing





CD drive accessing

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  1. LWAd is the statistical upper-limit A-weighted sound power level (rounded to the nearest 0.1 B).

  2. LpAm is the mean A-weighted sound pressure level measured at the operator position (rounded to the nearest dB).

  3. 1 B (bel) = 10 dB (decibel).


Apple takes a holistic view of materials management and waste minimization. Learn more about how to recycle your Mac.

In the Box

  • iMac

  • Apple Wireless Keyboard

  • Apple Magic Mouse

  • Power cord

  • Install/restore DVDs

  • Printed and electronic documentation

Included Software

OS X Lion

Includes Mail, Address Book, iCal, the Mac App Store, iTunes, Safari, Time Machine, FaceTime, Photo Booth, Mission Control, Launchpad, AirDrop, Resume, Auto Save, Versions, Quick Look, Spotlight, QuickTime, and more.


Includes iPhoto, iMovie, and GarageBand.

Configurable Options

Purchase from the Apple Online Store to upgrade processor, graphics, memory, and hard drive, or to swap Magic Mouse for Magic Trackpad.

  • 2.7 GHz

      • Magic Trackpad

      • 8GB memory upgrade (two 4GB)

      • 16GB memory upgrade (four 4GB)

      • 2TB hard drive

      • 256GB solid-state second drive

  • 3.1 GHz

      • Magic Trackpad

      • 8GB memory upgrade (two 4GB)

      • 16GB memory upgrade (four 4GB)

      • 2TB hard drive

      • 256GB solid-state second drive

      • 3.4GHz quad-core Intel Core i7

      • AMD Radeon HD 6970M with 2GB of GDDR5 memory


Mac Software

  • iWork

  • Aperture

  • Logic Express

  • Final Cut Express

Displays and Graphics

  • Apple Mini DisplayPort to DVI Adapter

  • Apple Mini DisplayPort to VGA Adapter

  • Apple Mini DisplayPort to Dual-Link DVI Adapter

AirPort and Wireless

  • Time Capsule

  • AirPort Express Base Station

  • AirPort Extreme Base Station

Other Accessories

  • Magic Trackpad

  • Apple Battery Charger

  • VESA Mount Adapter Kit

  • AppleCare Protection Plan

  1. 1GB = 1 billion bytes and 1TB = 1 trillion bytes; actual formatted capacity less.

  2. Wireless Internet access requires a wireless access point and Internet access; fees may apply.

  3. Weight varies by configuration and manufacturing process.

  4. Acoustics measured on standard 27-inch iMac systems. Acoustics may vary by configuration.

  5. PVC-free AC power cord is available in the U.S., Canada, Mexico, Colombia, El Salvador, Guatemala, Panama, Peru, Puerto Rico, U.S. Virgin Islands, and Venezuela.

  6. iMac achieved a Gold rating from EPEAT in the U.S. and Canada.

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