Hey All- Long time forum reader here, first time poster. I just picked up an awesome 2010 iMac, 3.2 Ghz, 1TB hard drive, 4GB memory computer. I love it- but I want to put more memory in it. Its running Yosemite. Now, I found conflicting info on the internet. It says that this machine can support up to 16gb of RAM, but some say it will only use 8, even if there are 16 in there. Is this true? Also, this is the kit I was thinking of getting: http://www.crucial.com/usa/en/imac-(21*5-and-27-inch,-mid-2010)/CT3309300 Now, if I get that 8gb kit and put it in the computers two empty slots, will that just boost my memory to 12 GB? Or should I get two of those and replace all the memory completely? Thanks for any advice you can give.