read up on it....called the apple wizards and while i am not very bright- i am not sure about the apple wizards either--? new late 2013 27" iMac me089xx came with 8 gig-i want to upgrade, but to what? the wizards say 16 gig is max- however i read that 32 is. i assume 32 is third party hw.? can someone give me some informed information on memory upgrade? how much money and 16 or 32g and details if i need any.thank you very much--new guy here some of the confusion is mine.--and some is the wizards-however i know where to go to for the correct information. and thank you very much for your trouble.