Hello,
I want to upgrade my mid 2011 iMac with additional 4GB.
Currently there is 2x2GB and here is the question:
Should I buy new 2x2GB or can I buy 1x4GB so I can add 2nd 4GB later.
From what I understand, memory needs to be installed/replaced in pairs. Therefore, you should go 2x2GB or 2x4GB.