Install RAM in a Macbook Pro - Kingston Technology - YouTube
Teardown of new 21.5-inch iMac surprisingly reveals user-upgradable RAM, modular CPU - 9to5Mac
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
Kingston Technology 8GB Kit (2x4 GB Modules) 1066MHz DDR3 SODIMM Notebook Memory for Select Apple iMac's and Macbooks KTA-MB1066K2/8G at Amazon.com
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Amazon.com: Kingston KCP316SD8/8 8gb 1600mhz Sodimm Mem : Home & Kitchen
Kingston Technology 4 GB Memory for Select Apple Imac's and Macbooks Single (Not a kit) 1066 MHz (PC3 8500) 204-Pin DDR3 SO-DIMM KTA- MB1066/4G at Amazon.com
Kingston Technology 8GB Kit (2x4 GB Modules) 1333MHz DDR3 SODIMM Notebook Memory for Select Apple iMac's and Macbook Pro's KTA-MB1333K2/8G at Amazon.com
32.0GB OWC Memory Upgrade Kit For 2010-2011 Apple iMac
Apple iMac Mid 2011 21.5-inch 2.7GHz Core i5 Apple DDR3 RAM Memory | Kingston
iMacs for sale in Odessa, Ontario | Facebook Marketplace | Facebook