iMac 21.5-inch Mid 2011 Datasheet

iMac 21.5-inch
Source: apple.com – iMac 21.5-inch

The Apple iMac 21.5-inch Mid 2011 is a personal computer designed, manufactured, and sold by Apple from 2011 to 2012 as part of the iMac series. The computer was introduced on May 3, 2011, and its price started at $1,199.

The new iMac features a 2.5 GHz or 2.7 GHz Intel Core i5 processor or 2.8 GHz Intel Core i7 processor, 4 GB of RAM, 21.5-inch glossy LED-backlit IPS LCD Display, 500 GB or 1 TB 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 512 MB AMD Radeon HD 6759M graphics in the base model.

This iMac has been discontinued on October 23, 2012. Today iMac 21.5-inch Mid 2011 is 13 years old!

iMac 21.5-inch Mid 2011 Details

IntroducedMay 3, 2011 – 13 years ago
DiscontinuedOctober 23, 2012 – 11 years ago
Last Software UpdateNovember 12, 2020 – 3 years ago
Time on the Market17 months (1 year)
Time of Support114 months (9 years)
Model IdentifieriMac12,1
Model NumberA1311
Order NumberMC309LL/A
Original Price$1,199
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 i5 2400S “Sandy Bridge” (2.5 GHz)
Intel Core i5 2500S “Sandy Bridge” (2.7 GHz)
Intel Core i7 2600S “Sandy Bridge” (2.8 GHz)
Processor Speed2.5 GHz
2.7 GHz
2.8 GHz
Number of Cores4
System BusIntel Direct Media Interface (DMI) at 2.5 GT/s
Cache6 MB on-chip shared L3 (2.5 GHz and 2.7 GHz)
8 MB on-chip shared L3 (2.8 GHz)

Storage & Media

Storage500 GB HDD
256 GB SSD
Media1 – 8x DVD-R/CD-RW dual-layer “SuperDrive” slot-loading drive


Built-in Memory4 GB
Maximum Memory16 GB (Apple)
32 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
AMD Radeon HD 6770M
Graphics Memory512 MB GDDR5 SDRAM
Display Connection1 – Thunderbolt (Support for up to two Thunderbolt displays)
Display ModesDual display extended, video mirroring, AirPlay, and Target Display
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)
Wi-FiAirPort Extreme Card 802.11a/b/g/n
BluetoothBluetooth 2.1 + EDR
USB4 – 480 Mbps (USB 2.0)
FireWire1 – 800 Mbps
Thunderbolt1 – Thunderbolt 1 (Up to 10 Gbps)
Infrared1 – For Apple Remote only
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 – Thunderbolt (Support for up to two Thunderbolt displays)

Keyboard and Mouse

PeripheralsApple Wireless Aluminum Keyboard
Magic Mouse or Magic Trackpad


Original OSMac OS X 10.6.6
Later OSMac OS X 10.6.7
Maximum OSmacOS 10.13.6
FirmwareIntel Extensible Firmware Interface
Bundled SoftwareMac OS X 10.6
iLife ’11 (includes iPhoto, iMovie, iDVD, 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.