A1311 iMac 21,5" 2009-2011

Same series:
iMac 21,5" 2009-2011 (A1311)iMac 21,5" 2012-2017 (A1418)
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The A1311 iMac is a model of Apple's all-in-one desktop computer, produced from late 2009 to mid-2011. It falls in the iMac line-up with 21.5-inch displays, offering a compact yet powerful desktop solution. The following technical description and specifications focus on details pertinent to repair and spare parts identification.

Model Identification

  1. Model Numbers and References:

    • The A1311 model designation encompasses several iMacs from the 2009 to 2011 timeframe.
    • Known EMC numbers include EMC 2308, 2389, and 2428, correlating to different iterations within this generation.

  2. Identification Codes:

    • Model Identifier:
      • iMac10,1 for the late 2009 release
      • iMac11,2 for mid-2010
      • iMac12,1 for mid-2011
    • These can be found within the operating system by selecting "About This Mac" or in the "System Information" application.

  3. Physical Identification:

    • The serial number and EMC number are typically located on the bottom of the iMac stand.

Device Specifications

  1. Display:

    • Size: 21.5 inches
    • Type: LED-backlit display with IPS technology
    • Resolution: 1920 x 1080 pixels

  2. Processor:

    • Late 2009: Intel Core 2 Duo
    • Mid 2010 and 2011: Options included Intel Core i3, Core i5, or Core i7 processors.

  3. Memory:

    • RAM is user-upgradeable.
    • Late 2009: Offered in 4GB, upgradable to 16GB, using 1066 MHz DDR3 SDRAM SO-DIMMs.
    • Mid 2010/2011: Started at 4GB, upgradable to 16GB, using 1333 MHz DDR3 SDRAM SO-DIMMs.

  4. Storage:

    • Various options including 500GB and 1TB hard drives (7200 RPM).
    • Some configurations offered SSD storage or the combination of an HDD and SSD.

  5. Graphics:

    • Different configurations were available, including integrated NVIDIA GeForce 9400M (late 2009) and discrete ATI Radeon HD 4670, HD 5670, or AMD Radeon HD 6750M, 6770M (mid 2011).

  6. Cameras:

    • iSight Camera: Integrated above the display.

  7. Battery and Charging:

    • Being a desktop, the iMac A1311 does not utilize a rechargeable battery; it is powered via an AC mains connection.

  8. Ports and Connectivity:

    • Mini DisplayPort
    • Four USB 2.0 ports
    • SD card slot (Supporting SDXC cards starting mid-2011)
    • Ethernet port, FireWire 800, and audio line-in/out.

  9. Wi-Fi/Bluetooth:

    • Integrated AirPort Extreme Wi-Fi (802.11 a/b/g/n) and Bluetooth 2.1 + EDR.

This technical description provides detailed specifications for spare parts identification and repair considerations. Identifying the correct model and EMC number is crucial for sourcing appropriate components such as memory modules, display panels, or processors compatible with a specific iMac A1311 unit.

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