I purchased an IMac about six months ago and ordered additional memory according to what was already installed to put in the empty slots. It can take two 2GB DDR3, 1067 MHZ memory sticks, so I order from New Egg. I received it today and went to install it and the memory sticks are twice the length of the currently installed memory. I'm assuming Apple uses laptop memory, correct? Anyway, can someone tell me specifically what memory I need to order for the IMac? Thanks.