Hi, I have the white unibody macbook with the 2.26ghz proc. I recently upgraded the ram from 2GB to 4GB of crucial RAM. noticed a nice diff in speed especially with a lot of applications open. much fewer swaps. http://eshop.macsales.com/item/Western Digital/WD3200BEKT/ I was looking at this WD HD. Will this HD fit in my Macbook? Will the 7200 rpm drain my battery faster? And will it heat up the rest of the computer more? These questions are the only thing thats holding me back from getting it. Also it seems very cheap. And btw I usually just use photoshop, itunes, browser with a lot of tabs, some video editing, and a game occasionally. I also wanted to speed up the time it takes to write information too and from my external HD. Seems a bit slow atm..