iMac 21.5-inch Late 2011 Datasheet

iMac 21-inch
Source: – iMac 21-inch

The Apple iMac 21.5-inch Late 2011 (Education Only) is a personal computer designed, manufactured, and sold by Apple from 2011 to 2013 as part of the iMac series. The computer was introduced on August 8, 2011, and its price started at $999.

The new iMac features a 3.1 GHz Intel Core i3 2100 processor, 2 GB of RAM, 21.5-inch glossy LED-backlit IPS LCD Display, 250 GB hard drive, slot-loading 8x DVD-R/CD-RW dual-layer “SuperDrive”, Ambient Light Sensor, FaceTime HD camera, USB 2.0 ports, an SDXD card slot, and 256 MB AMD Radeon HD 6750M graphics in the base model.

This iMac has been discontinued on March 5, 2013. Today iMac 21.5-inch Late 2011 is 12 years old!

iMac 21.5-inch Late 2011 Details

IntroducedAugust 8, 2011 – 12 years ago
DiscontinuedMarch 5, 2013 – 11 years ago
Last Software UpdateNovember 12, 2020 – 3 years ago
Time on the Market18 months (1 year)
Time of Support111 months (9 years)
Model IdentifieriMac12,1
Model NumberA1311
Order NumberMC978LL/A
Original Price$999
Weight20.5 Ibs.
9.298 KG
Dimensions17.75” H x 20.8” W x 7.42” D
45.08 cm H x 52.83 cm W x 18.84 cm D

iMac 21.5-inch Tech Specs


ProcessorIntel Core i3 2100 “Sandy Bridge”
Processor Speed3.1 GHz
Number of Cores2
System BusIntel Direct Media Interface (DMI) at 2.5 GT/s
Cache3 MB on-chip shared L3

Storage & Media

Storage250 GB HDD
Media1 – 8x DVD-R/CD-RW dual-layer “SuperDrive” slot-loading drive


Built-in Memory2 GB
Maximum Memory8 GB (Apple)
16 GB (Actual)
Memory Slots4 – PC3-10600 204-pin DDR3 SO-DIMM 1333 MHz
Interleaving SupportYes


Built-in Display21.5″ IPS LED-backlit TFT LCD glossy widescreen Display
Brightness330 cd/m²
Resolutions1920 x 1080


Graphics CardAMD Radeon HD 6750M
Graphics Memory256 MB GDDR5 SDRAM
Display Connection1 – Mini DisplayPort
Display ModesDual display extended, video mirroring, and AirPlay Mirroring
External ResolutionUp to 2560 x 1600 pixels
CameraFaceTime HD


Expansion Slots1 – Secure Digital (SDXC)
Optical Drive Interface3 Gbps Serial ATA (SATA)
Hard Drive Interface2 – 6 Gbps Serial ATA (SATA)


Ethernet10/100/1000BASE-T (RJ-45)
USB4 – 480 Mbps (USB 2.0)
FireWire1 – 800 Mbps
Audio In1 – 3.5-mm analog/optical combo jack
1 – Built-in microphone
Audio Out1 – 3.5-mm analog/optical combo jack
2 – Internal 17 W amplifiers
2 – Built-in speakers
Display1 – Mini DisplayPort

Keyboard and Mouse

PeripheralsApple Keyboard with Numeric Keypad
Magic Mouse


Original OSMac OS X 10.7
Maximum OSmacOS 10.13.6
FirmwareIntel Extensible Firmware Interface
Bundled SoftwareMac OS X 10.7
iLife ’11 (includes iPhoto, iMovie, iWeb, GarageBand)


Backup Battery3 V CR2032 Lithium
Maximum Continuous Power205 W
Line Voltage100-240 V AC

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Disclaimer: The data presented in this article is under continuous development and has been manually collected from various sources based on their availability. The author of this article may revise this dataset as additional research is conducted and reviewed. Please note that the information is provided “as is” and “as available” without express or implied warranties. The author cannot be held responsible for any omissions, inaccuracies, or errors in the published information. Any warranties relating to this information are hereby disclaimed.