So, my Macbook Pro won't boot (model A1150). I followed all the steps in this guide and it still will only boot in safe mode, even after I reinstalled the OS. So now what? I'm thinking of replacing the hard drive (current capacity is 120gb) with this in hopes that that will solve my problem. Will replacing the hard drive fix my problem? Also, is this part compatible? Thanks. And if anyone could tell me (or point to a guide that will) how to install the OS once the new hard drive is installed it would be greatly appreciated.