I have an Early 2008 13 inch MacBook updated to Lion. According to this Apple KB the max RAM I can add is 4GB.

I know the OS that came with the initial computer didn't support 64 bit. So is this 4 GB limit a hardware or software limitation? Can I add more than 4 GB now that I have Lion (I understand it supports 64 bit)?

1 Answer 1


You can add up to 6GB of RAM in your MacBook. You can see the list here.

Depending on your

  • It is my understanding that RAM works better in pairs. Since I can't find 3 + 3, do you recommend I go 4 + 2, or just stay with 4 (2 + 2)? Apr 13, 2012 at 14:07
  • You need to go with 4 + 2. That's what I've done on my Late 2007 MacBook Pro (3,1). I have been using it that way for three years.
    – user9290
    Apr 13, 2012 at 14:09
  • Check with Other World Computing. goo.gl/LzGO0. Confirm your exact model number using the System Information under "About This Mac" in your Mac menu.
    – user9290
    Apr 13, 2012 at 14:10

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