NOTE: iMac Mid 2010 27 inch iMac 11,3 (3.2 GHz) and 21.5 inch iMac 11,2 (3.06 GHz/ 3.2 GHz/ 3.6 GHz) ONLY SUPPORT 4GB, DO NOT SUPPORT 8GB. Compatible for Apple Mac Book Pro -13 inch / 15 inch / 17 inch Early 2011, 13 inch / 15 inch / 17 inch Late 2011 - Mac Book Pro8,1 Mac Book Pro8,2 Mac Book Pro8,3 Compatible for Apple iMac - 27 inch Mid 2010, 21.5 inch / 27 inch Mid 2011, 21.5 inch Late 2011- iMac11,3 iMac12,1 iMac12,2 Compatible for Apple Mac Mini - Mid 2011 - MacMini5,1 MacMini5,2 MacMini5,3 DDR3 1333MHz PC3-10600 204 Pin Unbuffered Non-ECC 1.5V CL9 Dual Rank 2Rx8 based 512x8 Module Size: 8GB Guaranteed Lifetime warranty from Purchase Date Free technical support All Timetec modules are built from strict selected premium chip ICs for the high-performance potential to allow excellent stability and backed by Timetec’s advanced replacement program. All memory modules are engineered to perform in even the most extreme environments and rigorously worked to ensure that each module meets our stringent performance.