If I already have 2GB RAM and I buy 4GB RAM, does the 4GB add or replace the current 2GB? (Will I end up with 4GB or 6GB total RAM?)
I currently have Mac OS X 10.6.8 and I wish to upgrade to Mountain Lion, but I have read that I need first to get more RAM. Seeing that you can't buy it from the apple store anymore, I have looked at buying from a 3rd party site such as crucial.com or eshop.macbook.com.
What I don't understand is If I already have 2GB RAM and I buy 4GB RAM, does the 4GB add or replace the current 2GB? (Will I end up with 4GB or 6GB total RAM?).
Thanks
Kirstie