APPLE IMAC 2010, ALL-IN-ONE, 21″ inch Full HD , CORE 2 DUO, 2.26GHZ, R – Montag Store
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
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
NEW 2010 APPLE iMAC 160GB SSD 4GB RAM INTEL CORE 2 DUO FINAL CUT LOGIC - computers - by owner - electronics sale -...
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 Upgrade
How to upgrade RAM / Memory on a 2010 iMac Core i3 i5 i7 (21.5in & 27in) - YouTube