Hey everyone I'm new to MacForums. I have a mid 2007 imac with 3gb if ram ( 2gb and 1 gb in each slot). The apple site says I can Mac it at 4gbs of ram. When I google other places say it can actually hold 6gb. I mainly use my max for music production. I notice the "spinning wheel" a lot so wanted to upgrade the ram before I bought a new Mac. Anyone know how much it can hold? Thanks for any answers in advance!