I've done a search here and can't seem to get a solid answer regarding a memory upgrade for a late 2013 27" iMac. I ordered 27" iMac with the i7 chip, 780 video, 8 GB of memory and Fusion drive. I want to put another 16 GB of memory in the iMac for a total of 24 GB. From what I've been reading, some brands don't work well with the installed Apple Ram. Other brands work for some people but not for others. Right now I'm looking at Crucial on Amazon and it seems to be the correct RAM but some of the comments say that it doesn't work in the late 2013 27" iMac. Others say it does. Here is the link: http://www.amazon.com/gp/product/B0...pf_rd_t=101&pf_rd_p=1688200382&pf_rd_i=507846 It's a great deal and according to Apple's website, it IS the correct RAM. Does anyone have any recommendations on what RAM I should be using and absolutely will work with the 2013 27" iMac? Thanks.