Kingston Technology 4 GB Memory for Select Apple Imac's and Macbooks Single (Not a kit) 1066 MHz (PC3 8500) 204-Pin DDR3 SO-DIMM KTA- MB1066/4G Includes one 4GB module of 1066MHz DDR3 Desktop memory for select iMac's and Macbooks Works with imac intel core 2, mac mini, and select macbook pro Memory designed, manufactured and tested to the specifications of each particular brand name computer system From the industry leader in PC memory 204-pin SODIMM type