Technical Guidance on Adding More RAM to a 27-inch iMac

Adding more RAM is the most feasible solution to speed up your iMac. And there is no need to go to the service center, as you can install RAM on your own in the comfort of your home.

This guide is going to describe a step-by-step procedure of installing RAM on a 27-inch iMac:

  1. First of all, if you have been working with your iMac, power it off and let it cool down for about ten or fifteen minutes.
  2. Then plug out the power cord and all other cables.
  3. After that, put a clean cloth on a smooth surface and lay your iMac face down on this cloth.
  4. When ready, press a button above the AC port to open the memory compartment.
  5. Then eject the memory compartment door.
  6. After that, release the memory cage by pushing the two levers outward.
  7. Then put the memory cage levers towards yourself to get access to the DIMM (dual inline memory module) slots.
  8. After that, pull the module straight up and out to remove a DIMM.
  9. Then set a new module into the slot by pushing it until you hear a click sound. Please note that the notch at the bottom of the DIMM should be correctly oriented (either towards the right or towards the left).
  10. After you install all the modules, push back the memory cage levers until you hear a click sound.
  11. Then place back the memory compartment door without pressing the button.
  12. After that, return your iMac back to the upright position.
  13. Finally, plug in all the cables and start your iMac.


As a result of adding more RAM, your 27-inch iMac will be running twice as faster as before. However, there’s also an alternative way of speeding up your Mac. Instead of adding new RAM, you can free up the resources of the existing RAM with special memory optimization apps, such as MacKeeper MemoryKeeper. To learn more about MemoryKeeper and how to use it, please read this review. Good luck!