Hosting and bandwidth provided by MacAce.net.











Apple iMac "Core i5" 2.66 27-Inch (Late 2009) Specs

Identifiers: Late 2009 - MB953LL/A - iMac11,1 - A1312 - 2374

All iMac Models | All 2009 Models | Dynamically Compare This Mac to Others

Distribute & Use Page: Bookmark & Share or Embed | Download: PDF Manual


Apple iMac Intel AluminumThe iMac "Core i5" 2.66 27-Inch Aluminum (Late 2009) is powered by a 2.66 GHz Quad Core Intel "Core i5" I5-750 (Lynnfield/Nehalem) processor with a dedicated 256k level 2 cache for each core and an 8 MB shared level 3 cache.

By default, it is configured with 4 GB of RAM (1066 MHz PC3-8500 DDR3 SDRAM), a 1 TB (7200 RPM) hard drive, a vertically-mounted slot-loading DVD±R DL "SuperDrive", and ATI Radeon HD 4850 graphics with 512 MB of dedicated GDDR3 memory.

It also has a built-in iSight 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, and Gigabit Ethernet, as well as a Mini DisplayPort, which supports an external display up to 30" (2560x1600). This model also "supports input from external DisplayPort sources" with adapters, so it can be used as an external display for DisplayPort-equipped devices as well as a computer.

The "Late 2009" iMac line looks similar to earlier Aluminum iMac models but have an "edge-to-edge" glass design and a "seamless all aluminum enclosure" (previous aluminum models have a modest aluminum border around the display and a plastic back).

Externally, the displays are enhanced with LED-backlighting and "IPS technology" for improved quality, and internally, each has four RAM slots supporting up to 16 GB of RAM (rather than two slots and 8 GB of RAM for earlier models). All "Late 2009" models also include an SD Card slot and redesigned speakers that promise "louder, clearer sound with better bass response and less distortion".

The "Late 2009" iMac models shipped with a compact aluminum Apple Wireless Keyboard and a new multi-touch "Magic Mouse" where the "entire top is a seamless multi-touch surface" that allows one to "navigate using intuitive finger gestures". A new aluminum remote was offered for an additional US$19 as well.

Also see:

  • What are the differences between the "Late 2009" Aluminum iMac models?
  • How do the "Late 2009" Aluminum iMac models compare to the "Early 2009" 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.

Fix This Mac -- free diagnosis and affordable 24-hour repair at site sponsor Mission Repair.



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


October 20, 2009 July 27, 2010
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 2009.
1 (4 Cores) 64-Bit
Details: Also see: All models with a 64-Bit processor courtesy of EveryMac.com's Ultimate Mac Sort.
6879 9717
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 iMac11,1 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.
1972 5825
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 iMac11,1 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.
2165 6462
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 iMac11,1 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.
2.66 GHz Core i5 (I5-750)
Details: This model is powered by a 45 nm, 64-bit "Lynnfield/Nehalem" Intel "Core i5" processor with quad cores -- four independent processor cores on a single silicon chip. Each core has a dedicated 256k level 2 cache, shares 8 MB of level 3 cache, and has an integrated memory controller (dual channel). It also supports "Turbo Boost" -- 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). It does not support Hyper Threading.

Also see: How much faster are the high-end Core i5/Core i7-powered "Late 2009" Aluminum iMac models than the Core 2 Duo powered models? How much faster are these models than the "Early 2009" models replaced?
3.2 GHz 2.8 GHz (Core i7)
Details: This model additionally could be configured with a 2.8 GHz "Core i7" processor (I7-860) for an extra US$200. The "Core i7" processor does support Hyper Threading.

As requested by readers, EveryMac.com also has documented this custom configuration as its own model.
LGA 1156 (Socket H) Integrated
Details: This model's processor uses an LGA 1156 Socket H.

Also see: Is it possible to upgrade the processor in the Aluminum iMac models?
2.5 GT/s* 2.66 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 2.5 GT/s.
EFI 64-Bit
Details: N/A
32k/32k x4 256k (x 4), 8 MB
Details: Each core has its own dedicated 256k level 2 cache and the system has 8 MB of shared level 3 cache.
PC3-8500 DDR3 1066 MHz
Details: Supports 1066 MHz PC3-8500 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 was installed as two 2 GB SO-DIMM modules. Two slots free.

*Officially, this model supports a maximum of 16 GB of RAM. However, as carefully confirmed by Other World Computing, this model can support up to 32 GB of RAM if it is running Mac OS X 10.6.3 "Snow Leopard" or higher in 64-bit mode and has been updated to use the latest EFI version. It is limited to 16 GB of RAM in 32-bit mode.

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: This model supports four 4 GB modules -- one in each slot for a maximum of 16 GB of memory.
Radeon HD 4850 GDDR3
Details: This model has an ATI Radeon HD 4850 graphics processor with 512 MB of dedicated GDDR3 memory.

Also see: What type of video processor is provided by the Aluminum iMac systems? Is it upgradable?
512 MB 512 MB
Details: 512 MB of dedicated GDDR3 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 "typical" brightness of 375 cd/m2, and viewing angle of 178 degrees horizontal and 178 degrees vertical. The contrast ratio is 1000:1 and the PPI is 109.

Also see: How does the display quality of the 21.5-Inch and 27-Inch "Late 2009" Aluminum iMac models compare to previous Aluminum iMac models?
Dual/Mirroring 2560x1600
Details: Apple reports that this model simultaneously supports the native resolution of the built-in display and up-to a 30-inch external display (2560x1600).
1 TB (7200 RPM) Serial ATA (3 Gb/s)
Details: This model also can be equipped with a 2 TB hard drive for an additional US$250.

Also see: How do you upgrade the hard drive in the Aluminum iMac models? What type of hard drive do they support? Can you swap the hard drive for an SSD?

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/DVD±RW/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."

Site sponsor Other World Computing offers a "Data Doubler" mounting kit that may be of interest. It makes it simple to install a second hard drive or SSD in the optical drive bay of this iMac.
None 10/100/1000Base-T
Details: N/A
802.11a/b/g/n 2.1+EDR
Details: AirPort Extreme (802.11a/b/g/n) and Bluetooth 2.1+EDR standard.

Also see: What is 802.11n? How is it different from 802.11b, 802.11g, and 802.11a?
4 (2.0) 1 (800)
Details: Four USB 2.0 ports and one Firewire "800" port (7 watts).
SD Card None
Details: N/A
Apple Wireless Keyboard Magic Mouse
Details: This model shipped with a small aluminum "ultrathin, compact wireless keyboard" (no numeric keypad) and a new wireless "Magic Mouse", where the "entire top is a seamless multi-touch surface" that allows one to "navigate using intuitive finger gestures".

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 cases used by the "Late 2009" iMac models look similar to the one used by previous "Aluminum" models, but the "Late 2009" design has "edge-to-edge glass" for the display and a "seamless all aluminum enclosure" (the earlier models had a plastic back).
MB953LL/A Late 2009
Details: The Apple order number should be unique to this system.
A1312 (EMC 2374) iMac11,1
Details: Please note that these identifiers often refer to more than one model.

Also see: All Macs with the A1312 Model Number, the 2374 EMC Number, and the iMac11,1 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 10.6.1 (10A2155) Current*
Details: *This system fully supports the last version of OS X 10.8 "Mountain Lion" and the current version of OS X 10.9 "Mavericks," except for Power Nap and AirPlay Mirroring functionality (which also requires an Apple TV 2nd Gen or later.

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."
XP SP2 (32-Bit)* 7 (64-Bit)*
Details: *Apple's Boot Camp 4 supports the 32-bit and 64-bit versions of Windows 7 on this model. However, the system does meet Microsoft's minimum requirements for Windows 8 and readers have reported successfully running the 32-bit and 64-bit versions of this operating system with appropriate drivers.
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$1999 US$1100-US$1250
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 Computer.



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.


1* (Mini DisplayPort w/ Audio) None
Details: Supports external display in dual display and mirroring modes. Mini DisplayPort also supports DVI, VGA, and dual-link DVI with optional adapters. The 27-Inch models also accept "input from external DisplayPort sources" with an adapter, so it is possible to use these models as an external display for a DisplayPort-equipped Mac or Blu-ray player, for example.

*Note that unlike earlier iMac models, the Mini DisplayPort on this system passes audio signals as well as video.
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: Combined "audio line in/optical digital audio input (minijack)."
1 1
Details: Single shared "headphone/optical digital audio output (minijack)".
1 None
Details: N/A
1 None
Details: 100V-240V, 241W maximum for 21.5-Inch models, 365W maximum for 27-Inch models.



Global original prices for the iMac "Core i5" 2.66 27-Inch (Late 2009) 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$2099 US$1999

Original Prices - Europe

€1799 €1799
DKK 13,799 €1799
€1799 €1799
€1799 €1799
€1799 NOK 15.490
€1799 €1749
SEK 19.495 CHF 2'399
£1599

Original Prices - Asia

RMB 15,998 HK$15,488
¥198,800 N/A
NT$69,900

Original Prices - Australia & New Zealand

A$2599 NZ$3399


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


Permalink | E-mail a Friend | Bookmark & Share | Report an Error/Typo

Suggest an Addition | Twitter | Facebook | Google+ | Join the E-mail List


<< iMac (Home)




EveryMac.com is provided "as is" without warranty of any kind whatsoever. EveryMac.com, and the author thereof, shall not be held responsible or liable, under any circumstances, for any damages resulting from the use or inability to use the information within. For complete disclaimer and copyright information please read and understand the Terms of Use and the Privacy Policy before using EveryMac.com. Use of any content or images without expressed permission is not allowed, although links to any page are welcomed and appreciated.