DDR3 1066MHz PC3-8500 204-Pin Unbuffered Non ECC 1.5V CL7 Dual Rank 2Rx8 based 512x8 Module Size: 16GB KIT(2x8GB) Package: 2x8GB Guaranteed Lifetime warranty from Purchase Date Free technical support NOTE: Apple OS 10.7.5 or Later REQUIRED for utilization of more than 8GB of total system memory and need to updated with the latest EFI Compatible for Apple Mac Book - 13 inch Mid 2010 - Mac Book7,1 (2.4 GHz) Compatible for Apple Mac Book Pro -13 inch Mid 2010 - Mac Book Pro7,1 (2.4 GHz, 2.66GHz) Compatible for Apple iMac - 27 inch Late 2009 - iMac11,1 (2.66 GHz, 2.8GHz) Compatible for Apple Mac Mini - Mid 2010 – MacMini4,1(2.4GHz, 2.66GHz, Server) Timetec – Memory of a lifetime Compatible with (But not Limited to):*Please click image for more compatible systems modelNeed to know if this part is compatible?Contact us with manufacturer and model information of your motherboard