Timetec Timetec 8Gb Kit(2X4Gb) Compatible For Apple Ddr3 1067Mhz / 1066Mhz Pc3-8500 Cl7 For Mac Book, Mac Book Pro, Imac, Mac Mini (Late 2008, Early/ Mid/Late 2009, Mid 2010) Sodimm Memory Mac Ram
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
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
How to upgrade RAM / Memory on a 2010 iMac Core i3 i5 i7 (21.5in & 27in) - YouTube
Install memory in an iMac - Apple Support
Apple iMac A1311 21.5" AiO Computer i3-540 (Mid-2010) -
Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
iMac RAM for Model 11.2 to 12.2 | DDR3-1066MHz | 8GB | MacMemory.com
Installing additional SSD in Mid-2010 27" iMac
iMac RAM Models 11.3 (i5 and i7 only) to 12.2 (8GBx4) | MacMemory.com
Install memory in an iMac - Apple Support
RAM upgrade considerations for iMac systems - CNET