How To Upgrade Apple iMac Memory
This can be done in less than 30 minutes whether you are new to computers or not.
VERY IMPORTANT:
- This is upgrade is for iMac 21.5" for late 2011 Model.
- Anti Static bracelet will be useful in case you're uncertain about any type of remaining electricity going into the iMac.
1- Unplug the power adapter, make sure there's no power WHATSOEVER going in.
2- Place the iMac on a flat surface but use a soft and clean towel before doing that to avoid scratching the display.
3- Remove the screws from the Memory Access door of the iMac using a Philips Screwdriver

4- Untuck and Gently pull the tab to eject any installed memory module.

5- Now you can insert your new memory into the empty slots, push the memory sticks until you hear the click.

6- Screw the Memory Access Door back in and place the monitor back to its upright position.
7- If you are still confused with the STEPS, please watch the video below.
Sources: iMac figures from www.apple.com and Anti Static bracelet can be purchased from eBay or Amazon.