Added 16gb Ram but Mac only shows 8gb

Discussion in 'MacBook Pro' started by AaronMac1981, Dec 31, 2012.

  1. AaronMac1981 macrumors newbie

    Dec 31, 2012
    Added 16gb (8+8) but the computer only shows 1 slot filled (8gb) and the other empty. This is MacBook Pro 2.2 ghz intel core i7 running osx lion 10.7.5. Any thoughts as to why the second ram stick isn't picking up?
  2. Tyler23 macrumors 603


    Dec 2, 2010
    Atlanta, GA
    What year is it?

    Some Macbook pros (like my mid-2009) can only take up to 8 GB of RAM.
  3. NewbieCanada macrumors 68030

    Oct 9, 2007
    This happened to me when I installed more RAM in my Mac mini. Embarassingly, I just hadn't installed the second stick properly. Try opening it up again and remove the stick. Make sure it clicks into place.
  4. Acorn macrumors 68020


    Jan 2, 2009
    he says it has a core i7 in it. if it was that old it would have a core 2 duo
  5. AaronMac1981 thread starter macrumors newbie

    Dec 31, 2012
  6. NewishMacGuy macrumors 6502a


    Aug 2, 2007
    Yep, sounds like you just don't have it seated properly. It can be a bit tricky to know just how much force to use on some machines. As has been said make sure that it "clicks" in and that the bottom stick is fully horizontally seated. The top one won't always go into full horizontal, but the rounded alignment guides should line up with the rounded pegs if you push it down. If they don't, you'll have seating problems.

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