How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
iMac RAM Memory Installation 2009 2010 2011 21 5" Apple Dollars #13 - YouTube
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Samsung ram Memory Upgrade DDR3 PC3 12800, 1600MHz, 204 PIN, SODIMM for 2012 Apple MacBook Pro's, 2012 iMac's, and 2011/2012 Mac Mini's (16GB kit (2 x 8GB)) at Amazon.com
install - Installing and Upgrading Ram on a mid 2011 iMac (different size RAM) - Ask Different
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :
iMac Intel 27" EMC 2429 (Mid 2011) Memory Maxxer RAM Upgrade Kit
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
Memory RAM Upgrade for Apple iMac 21.5-inch Mid 2011 4GB/8GB DDR3 SODIMM | eBay
iMac Intel 21.5" EMC 2428 RAM Replacement - iFixit Repair Guide
Install memory in an iMac - Apple Support
A-Tech 8GB (2x4GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010, Mid 2011, Late 2011), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
How (And Why) To Install More RAM In Your iMac
32.0GB OWC Memory Upgrade Kit For 2010-2011 Apple iMac
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Maximum memory for 2011 iMac - Ask Different
Install memory in an iMac - Apple Support
How to Upgrade the RAM in Your iMac
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :
Install memory in an iMac - Apple Support
How to upgrade RAM / Memory on a 2010 iMac Core i3 i5 i7 (21.5in & 27in) - YouTube
CMS 32GB (4X8GB) DDR3 10600 1333MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I5 3.1 27-Inch (Mid-2011) - C12 - Walmart.com
