Can I, by myself, buy an extra 8gb ram and add it to this Macbook pro 15 late 2013 with 8gb ram?
Here
http://www.apple.com/macbook-pro/specs-retina/
Apple says 'Configurable to 16GB'.
Does this mean, it is upgradeable only in the initial purchase? Only as built-to-order(bto) order?
Is it upgradeable in apple service center?
Isn't it user upgradeable?