Memory RAM 1x 4GB Apple iMac Late 2011 DDR3 1333MHz SO-DIMM | E-OWC1333DDR38S4G | APPLE \ MEMORY FOR APPLE \ OWC \ APPLE IMAC \ iMac Late 2011 \ iMac 21.5'' (Late
Apple iMac 21.5" Desktop i5 2.5GHz 4GB Ram 500GB HD High Sierra A1311 - MC309LL/A - Refurbished - Walmart.com