I've just installed the 8gb memory kit that I bought from crucial, but when I go into activity monitor it says I still have 4gb RAM, is this normal or may i have put in one of the modules wrong?
I had the same problem.....it's hard to know when it's fulling installed. I was scared to press to hard, but you actually can put a little more pressure than you think. I always look to make sure the memory looks parallel to everything else.....tells me whether one side or the other is not fully seated.