I went to Crucial.com, downloaded and ran their little spec checking tool and then maxed out what I could. I was lucky in that the model I had allowed an EFI u

I went to Crucial.com, downloaded and ran their little spec checking tool and then maxed out what I could. I was lucky in that the model I had allowed an EFI upgrade (I think?) a few years ago which enabled the 16gb ram. I use a new 15' Macbook in the office and I have with-drawl symptoms with that new keyboard. Nice machines though, just a pity they are not serviceable.