I bought a 8GB RAM (4GBx2) from Amazon a week ago and tried to install it a few moments ago. I boot up the computer to check my new RAM and make sure it's working and it only says I have 3GB of RAM. I tried again by putting in one 4GB and the 1GB RAM that came with the laptop; now I had 2GB of RAM. I tried putting in the old RAM (1GBx2) that came with the laptop; I have the same 2GB I started with. I am so confused. I don't understand why it won't recognize it. I'll post some screenshots of what happened all 3 times I changed the RAM. I have a MacBook Pro (13-inch Mid 2009) With 4GB and 4GB installed http://tinypic.com/r/2viiczc/6 http://tinypic.com/r/wwgrrs/6 http://tinypic.com/r/dywwi/6 With 4GB and 1GB http://tinypic.com/r/244simo/6 with just 4GB http://tinypic.com/r/fu9ze8/6 With the original 2GB http://tinypic.com/r/sw5jyu/6 Can anyone help?