Worked just fine for me on an early 2007 Mac Book Pro that had a known Nvidia GPU issue. I did it in late 2012, when it was only worth about $200-250 on craigslist. After the bake, it worked fine for the next 2 years, but I was paranoid it would crap out again, stopped using it as my primary after a year.

I followed the instructions from : http://russell.heistuman.com/2010/04/27/cooking-the-books-or...