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Apple iMac "Core i5" 2.7 27-Inch (Mid-2011) Specs

Identifiers: Mid-2011 - MC813LL/A - iMac12,2 - A1312 - 2429

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Apple iMac Intel AluminumThe iMac "Core i5" 2.7 27-Inch Aluminum (Mid-2011) is powered by a Quad Core 2.7 GHz Intel "Core i5" I5-2500S (Sandy Bridge) processor with a dedicated 256k level 2 cache for each core and a 6 MB shared level 3 cache. In lieu of a system bus, it has a "Direct Media Interface" (DMI) that "connects between the processor and chipset" at 5 GT/s.

By default, it is configured with 4 GB of RAM (1333 MHz PC3-10600 DDR3 SDRAM), a 1 TB (7200 RPM) hard drive, a vertically-mounted slot-loading DVDR DL "SuperDrive", and AMD Radeon HD 6770M graphics with 512 MB of dedicated GDDR5 memory.

It also has a built-in "FaceTime HD" video camera and built-in stereo speakers underneath the 27" glossy 16:9 LED-backlit TFT Active Matrix LCD (2560x1440 native) display "with IPS technology".

Connectivity includes four USB 2.0 ports, a Firewire "800" port, built-in AirPort Extreme, Gigabit Ethernet, and an SDXC card slot as well as dual "Thunderbolt" ports that are backwards compatible with Mini DisplayPort and, likewise, each support an external display up to 30" (2560x1600). Thunderbolt also supports other peripherals that use the Thunderbolt standard which provides up to 10 Gbps of bandwidth in both directions.

Externally, the "Mid-2011" iMac line uses the same "edge-to-edge" glass design and "seamless all aluminum enclosure" as the "Mid-2010" models that came before them. Internally, however, the "Mid-2011" line is equipped with faster processors and faster graphics processors, as well as the aforementioned external improvements of a higher resolution (and wider angle) webcam and Thunderbolt.

The "Mid-2011" iMac models included a compact aluminum Apple Wireless Keyboard and the choice of either a multi-touch "Magic Mouse" or a multi-touch "Magic Trackpad" that "enables users to scroll smoothly up and down a page with inertial scrolling, pinch to zoom in and out, rotate an image with their fingertips and swipe three fingers to flip through a collection of web pages or photos" just like on Apple notebooks from the same era. An aluminum remote was offered for an additional US$19, too.

Also see:

  • What are the differences between the "Mid-2011" Aluminum iMac models?
  • How do the "Mid-2011" Aluminum iMac models compare to the "Mid-2010" models that preceded them?

Buy This Mac -- and all other new & used Macs -- at site sponsor PowerMax.

Buy Used iMacs and much more at site sponsor MegaMacs.

Upgrade This Mac at site sponsor Other World Computing. Memory, drives & more.

Repair This Mac. Quality Mac repair for 50% less than Apple at site sponsor MicroReplay.



Click on the underlined category text for related details. The most commonly needed info is "open" by default, but all info is important.


May 3, 2011 October 23, 2012
Details: The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.

Also see: All Macs introduced in 2011.
1 (4 Cores) 64-Bit
Details: Also see: All models with a 64-Bit processor courtesy of EveryMac.com's Ultimate Mac Sort.
7844 8565
Details: Geekbench 2 benchmarks are in 32-bit and 64-bit modes, respectively. These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench website. Higher numbers are better.

You also might be interested in reviewing all 32-bit and 64-bit Geekbench 2 user submissions for Macs with the iMac12,2 Model Identifier, which may include multiple models.

To dynamically compare Geekbench 2 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison.
2703 7121
Details: These Geekbench 3 benchmarks are in 32-bit mode and are for a single processor core and all processor cores, respectively. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.

You also might be interested in reviewing all 32-bit single core and multicore Geekbench 3 user submissions for Macs with the iMac12,2 Model Identifier, which may include multiple models.

To dynamically compare 32-bit Geekbench 3 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison.
2951 7826
Details: These Geekbench 3 benchmarks are in 64-bit mode and are for a single processor core and all processor cores, respectively. Both numbers reflect an average of user provided results as submitted to the Geekbench website. Higher numbers are better.

You also might be interested in reviewing all 64-bit single core and multicore Geekbench 3 user submissions for Macs with the iMac12,2 Model Identifier, which may include multiple models.

To dynamically compare 64-bit Geekbench 3 results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison.
2.7 GHz Core i5 (I5-2500S)
Details: This model is powered by a 32 nm, 64-bit Intel Core i5 "Sandy Bridge" processor with quad cores (four independent processor cores on a single silicon chip, each with one thread). Each core has a dedicated 256k level 2 cache and all processor cores share a single 6 MB level 3 cache. It also supports Turbo Boost 2.0 (up to 3.7 GHz) -- which "automatically boosts the processor speed based on workload" (so if an application is only using one of the four cores it will automatically increase the speed of the core in use and turn off the unused cores).

Also see: How much faster are the "Mid-2011" Aluminum iMac models than the "Mid-2010" models?
3.7 GHz N/A
Details: N/A
LGA 1155 (Socket H2)* Integrated
Details: *Officially, Apple provides no information about whether or not the processor in this model can be upgraded and the company does not intend for one to upgrade the processor either. However, this processor supports an LGA 1155 (H2) socket and it is possible to upgrade the processor to some extent.

Also see: Is it possible to upgrade the processor in the Aluminum iMac models?
5 GT/s* 2.7 GHz (Built-in)
Details: *This system has a "Direct Media Interface" (DMI) that "connects between the processor and chipset" in lieu of a traditional system bus. Intel reports that it runs at 5 GT/s.
EFI 64-Bit
Details: N/A
32k/32k 256k (x 4), 6 MB
Details: Each core has its own dedicated 256k level 2 cache and the system has 6 MB of shared level 3 cache.
PC3-10600 DDR3 1333 MHz
Details: Supports 1333 MHz PC3-10600 DDR3 SO-DIMMs (204-pin).

Also see: How do you upgrade the RAM in this Aluminum iMac model? How much RAM does it actually support?
4 GB 32 GB*
Details: By default, 4 GB of RAM is installed as two 2 GB SO-DIMM modules. Two slots free.

*Officially, this model supports four 4 GB modules -- one in each slot for a maximum of 16 GB of memory. However, third-parties have discovered that it actually will support 32 GB of memory using four 8 GB modules.

In the US (and many other countries), site sponsor Other World Computing sells memory -- as well as other upgrades -- for this iMac.

In Canada, site sponsor The Mac Market sells memory and other upgrades for this iMac.

In Australia, site sponsor RamCity sells memory and other upgrades for this iMac.

In Southeast Asia, site sponsor SimplyMac.sg sells memory and other upgrades for this iMac.

Also see: Actual Max RAM of All G3 & Later Macs.
None 4
Details: N/A
Radeon HD 6770M GDDR5
Details: This model has an AMD Radeon HD 6770M graphics processor with 512 MB of dedicated GDDR5 memory.

Also see: What type of video processor is provided by the Aluminum iMac systems? Is it upgradable?
512 MB 512 MB
Details: This model has 512 MB of dedicated GDDR5 video memory.
27" 16:9 Widescreen 2560x1440
Details: This model has a 27" glossy LED-backlit 16:9 widescreen TFT active matrix display with "IPS technology" and a native resolution of 2560x1440. Apple also reports a viewing angle of 178 degrees horizontal and 178 degrees vertical. The contrast ratio is 1000:1.

Site sponsor MicroReplay provides display replacement as well as advanced repair services like liquid spill recovery, logic board repair, accident and abuse repair, and more for this iMac.
Dual/Mirroring (x2) 2560x1600
Details: Apple reports that this model simultaneously supports the native resolution of the built-in display and up-to two 30-inch external displays (2560x1600) by using both Thunderbolt ports.
1 TB (7200 RPM) Serial ATA (6 Gb/s*)
Details: *As shipped, these models only supported the 3 Gb/s Serial ATA 2.0 standard for both a 3.5" hard drive and a 2.5" SSD. However, as first discovered by site sponsor OWC, the iMac EFI Update 1.6, released two days later, quietly provided 6 Gb/s Serial ATA 3.0 support.

Also see: How do you upgrade the hard drive in the "Late 2009," "Mid-2010" and "Mid-2011" Aluminum iMac models? What type of storage do they support? Is it even possible to upgrade these models?

Site sponsor Other World Computing sells storage upgrades for this iMac.

Site sponsor Mission Repair offers professional storage installation and other services in 24 hours for this iMac.
8X DL "SuperDrive" None
Details: Apple reports that the slot-loading 8X "SuperDrive" with 4X double-layer burning (DVD+R DL/DVDRW/CD-RW) "writes DVD+R DL discs at up to 4x speed, writes DVD-R and DVD+R discs at up to 8x speed, writes DVD-RW at up to 6x 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, [and] reads CDs at up to 24x speed."
None 10/100/1000Base-T
Details: N/A
802.11a/b/g/n (450 Mbit*) 2.1+EDR
Details: AirPort Extreme (802.11a/b/g/n) and Bluetooth 2.1+EDR standard. Although Apple formally makes no mention of it, as first discovered by HardMac, this model unofficially supports 450 Mbit/sec 802.11n Wi-Fi using MIMO.
4 (2.0) 1 (800)
Details: Four USB 2.0 ports and one Firewire "800" port (7 watts).
SDXC SD Card None*
Details: *This iMac has an extra 6 Gb/s Serial ATA connector and power for the optional SSD, but if one is not installed at the time the system is purchased the connector cables and mounting bracket are not present. Nevertheless, it is possible to install a 2.5" SSD in addition to the hard drive if an SSD is not installed initially it's just a bit of a "hack."
Apple Wireless Keyboard Magic Mouse/Trackpad
Details: This model shipped with a small aluminum "ultrathin, compact wireless keyboard" (no numeric keypad) and a choice, at no extra charge, of either the wireless "Magic Mouse", where the "entire top is a seamless multi-touch surface" that allows one to "navigate using intuitive finger gestures" or a wireless "Magic Trackpad" that provides multi-touch input like on a recent Apple notebook.

Also see: How does the "ultra thin" keyboard provided with the "Aluminum" iMac models compare to a more traditional desktop keyboard? How does it feel?
All-in-One iMac (Late 2009)
Details: The external case used by the "Mid-2011" iMac models essentially is identical to the one first introduced by the "Late 2009" line with "edge-to-edge glass" for the display and a "seamless all aluminum enclosure."
MC813LL/A Mid-2011
Details: The Apple order number should be unique to this system.
A1312 (EMC 2429) iMac12,2
Details: Please note that these identifiers refer to more than one model.

Also see: All Macs with the A1312 Model Number, the 2429 EMC Number, and the iMac12,2 Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section.
N/A N/A
Details: N/A
X 10.6.6 (10J4026) Current*
Details: *This system fully supports the last version of OS X 10.8 "Mountain Lion" as well as the current version of OS X 10.9 "Mavericks," with the exception of the "Power Nap" feature.

Please note that OS X "Lion" 10.7 and subsequent versions of OS X, like Mountain Lion and Mavericks, are not capable of running Mac OS X apps originally written for the PowerPC processor as these operating systems do not support the "Rosetta" environment. To run PowerPC applications on this Mac, it will be necessary to use Mac OS X 10.6 "Snow Leopard."
7 (32-Bit)* 8 (64-Bit)*
Details: *Apple's Boot Camp 4 supports the 32-bit version of Windows 7 on this model and Boot Camp 5 supports the 64-bit versions of Windows 7 and Windows 8. Earlier versions of Windows are not supported.
None Boot/Virtualization
Details: Also see: Are there any third-party programs to run Mac OS 9/Classic applications on Intel Macs?

Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.

For more on running Windows on Intel Macs, please refer to the exhaustive Windows on Mac Q&A.
20.4 x 25.6 x 8.15 30.5 lbs. (13.8 kg)
Details: In inches - height by width by depth, (51.7 cm, 65.0 cm, 20.7 cm).
US$1699 US$1500-US$1650
Details: Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).

Photo Credit: Apple, Inc.



Click on the underlined category text for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.


2 (Thunderbolt) None
Details: This model is equipped with two Thunderbolt ports rather than a Mini DisplayPort. Thunderbolt is backwards-compatible with Mini DisplayPort-equipped displays as well as adapters that are compatible with Mini DisplayPort (DVI, VGA, dual-link DVI and HDMI). It also can support other peripherals that use the Thunderbolt standard, which provides a maximum theoretical 10 Gbps of bandwidth in both directions.
None None
Details: N/A
None None
Details: N/A
4 (2.0) 1 (800)
Details: Four USB 2.0 ports and one Firewire "800" port (7 watts).
None 1 (RJ-45)
Details: No internal modem. Gigabit Ethernet, AirPort Extreme (802.11g/n) and Bluetooth 2.1+EDR standard.
None None
Details: N/A
1 (Built-in) 1
Details: Single "audio line in" port.
1 1
Details: Single "audio line out" port also can be used for headphones.
1 None
Details: N/A
1 None
Details: 100V-240V, 310W maximum for 27-Inch models.



Global original prices for the iMac "Core i5" 2.7 27-Inch (Mid-2011) in 24 different countries and territories follow; organized alphabetically by region.

For global original prices for Intel Macs in one particular country on a single page, please refer to EveryMac.com's Global Original Prices section.


Original Prices - North America

C$1699 US$1699

Original Prices - Europe

1649 1649
DKK 12,699 1679
1649 1649
1649 1649
1649 NOK 13.490
1679 1649
SEK 15.495 CHF 1'899
1399

Original Prices - Asia

RMB 12,998 HK$12,988
154,800 S$2,348
NT$55,900

Original Prices - Australia & New Zealand

A$1949 NZ$2799


Ten of the most popular Q&As about the iMac models follow.


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