Home Forums Apple Help Memory for MacBook 13 inch, Aluminum, late 2008 Forum Rules | Contact Forum Editor | Report a Post Memory for MacBook 13 inch, Aluminum, late 2008 jpdouglas 07:07 20 Oct 2015 Locked My MacBook 13 inch, Aluminum, late 2008 is fitted with 4Mb of memory comprising of 2Mb in each slot. Since installing OS El Capitan, my Mac is struggling to cope. Can the memory capacity be increased to say 6Mb or 8Mb? Macworld 10:22 20 Oct 2015 I think it might be - have a look on crucial's website and run one of their tests and it will tell you what RAM you can use. You can follow our guide to updating the RAM in your Mac here: click here This thread is now locked and can not be replied to.