I feel completely blind when I look at computer spec names sometimes, so I need help confirming if this is the correct RAM for either the late 2006 or mid-2007 Macbooks. I'm buying it for my sister for Xmas since her current laptop has only 1 GB of RAM, but she's unsure which year she has. I don't have access to her laptop. Anyway, would this be the correct RAM I would be getting her? I think the max for her Macbook is 4 GB. Crucial 4GB (2 x 2GB) 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model CT2KIT25664AC667 Thanks for any help.