Install memory in an iMac - Apple Support
New 16GB 4x4GB Memory Apple iMac (21.5 and 27-inch, Mid 2011) PC3-10600 at Amazon.com
iMac 21.5-inch (Mid-2011) Core I5-2400S 2.5GHz 500 GB HDD 4GB RAM | eBay
A-Tech 8GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module at Amazon.com
32.0GB OWC Memory Upgrade Kit For 2010-2011 Apple iMac
Memory Upgrades for Apple iMac 2009 - Up to 32GB
HOW TO: Upgrade The RAM to 32GB on a Mid-2011 21.5inch iMac - YouTube
iMac 21.5" Mid 2011 How To Change/Upgrade Your Ram For Better Performance 2014 - YouTube
A-Tech 32GB (4x8GB) RAM for Apple iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
iMac | 2.7 GHz Intel i5 | 21.5 Inch | Mid 2011 - Techable.com
![Apple iMac 21.5" Mid 2011 Intel Core i5 2.7 GHz 1TB SATA Disk 4GB RAM HighSierra | eBay](https://i.ebayimg.com/images/g/PNkAAOSwSMFjm0m9/s-l1200.webp "Apple iMac 21.5" Mid 2011 Intel Core i5 2.7 GHz 1TB SATA Disk 4GB RAM HighSierra | eBay")
Apple iMac 21.5" Mid 2011 Intel Core i5 2.7 GHz 1TB SATA Disk 4GB RAM HighSierra | eBay
Apple MC309LL/A 21.5 inch iMac Core i5 2.5 GHz 4GB RAM 500GB HDD Mid-2011 | Recycledgoods.com
Install memory in an iMac - Apple Support
How to upgrade RAM on iMac 21.5" 2011 - YouTube
iMac Intel 21.5" EMC 2428 (Mid 2011) Memory Maxxer RAM Upgrade Kit
iMac Intel 21,5" Mid 2011 EMC 2428 - used original spareparts for Macs
A-Tech 16GB (4x4GB) RAM for Apple iMac (Mid 2010, Mid 2011, Late 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
iMac 21.5-inch (Mid-2011) Core i5 2.5GHz - HDD 500 GB - 4GB | Back Market
A-Tech 8GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module at Amazon.com
Apple iMac 2.5Ghz i5-2400S (Mid-2011) *No HDD/RAM* – MSU Surplus Store
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
21.5-inch or 27-inch iMac (Mid 2011) Memory Installation iMac12,1 iMac12,2 - YouTube
Apple iMac 21.5" desktop computer All-in-one A1311 Mid 2011 i5 2.5GHZ 8GB 500GB 788619252453 | eBay
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
