...another 8gb RAM for my late 2012 27 inch iMac. It has 8 already but I've done my housekeeping and every test I've run says all is well. I am just sick of beach balls in iTunes (I keep my music on my Mybook Live NAS). Sometimes though, I get beach balls at odd times and it's annoying. The hard drive is a standard mechanical one. Has anyone else done this and has it made a noticeable improvement to the speed of your mac?