How do I know how much RAM to get?
I currently have a mid 2011 21.5" iMac running Mountain Lion with 8G of RAM. I want to exapnd this to 16G but i am not sure of how many slots I have available for extra RAM. Should I get one 8G card or two 4G cards? Can anyone assist?
iMac (21.5-inch Mid 2011), Mac OS X (10.7.4)