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Troubleshooting and Repair Documentation

The Apple Technician Guide for the iMac (27-inch, Late 2009) contains troubleshooting and disassembly information for the iMac Intel 27" EMC 2309 and 2374.


You can cost-effectively upgrade a number of components in the iMac Intel 27" EMC 2309 and 2374.

  • RAM: If your iMac is still running with only the stock RAM, upgrading will provide a dramatic performance boost at minimal cost. Upgrading to the maximum of 16 GB (Four 4 GB chips) provides unmatched performance.
  • Hard Drive: 1 TB hard drives came standard with the iMac Intel 27". You can upgrade the drive up to 2 TB.

Identification and Background

You can verify that you have a iMac Intel 27" EMC 2309 and 2374 by checking the processor information through "About This Mac" in the Apple menu.

Use the iMac identification system to help you identify your machine. iMacs tend to look very similar, and it's important to know which machine you have before ordering any replacement parts.

The iMac Intel 27" has multiple external and internal differences from 24" iMacs. Externally, the machine features edge-to-edge glass and an aluminum rear bezel. Internally, an LED display, more powerful video processing, and faster processors round out the impressive upgrades. Additionally, the 27" iMacs have the build-to-order option of a Quad Core i5 or i7 processors to give you the most powerful iMac experience yet!

Additional Information

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