I have a 2008 2.66GHz iMac currently with 4 GB of RAM. I am using OSX 10.6.8. I read that Apple lists this system as capable of 4 GB maximum RAM but then on www.everymac.com I read that with a 4GB module paired with a 2 GB module that 6 GB will work. My question is, does it matter which slot has which module? Has anyone tried this and have it work? Thanks in advance for any help.