Comment by acquacow

12 days ago

You should be able to do a 2gig + 4gig stick combo. That's what I have in my 2008 Macbook pro, it runs 6GB just fine.

It's a MacBook 5,1, not a MacBook pro. Its firmware only sees 3.5GB out of the 4GB installed, apparently it requires a BootROM upgrade to support more.