661-5194 Memory 1GB DDR3 1066 MHz for iMac 20 inch Mid 2009 A1224 Published July 31, 2018 at 350 × 350 in 661-5194 Memory 1GB DDR3 1066 MHz for iMac 20 inch Mid 2009 A1224 MC015LL/A, MC015LL/B