I tried swapping my Macbook Unibody hard drive into a new 13" Macbook pro to see if it would boot up properly (read on here that it should). It didn't work right. It would boot up my windows boot camp partition but NOT the OSX partition. So swapped the drives back into the original computers and it still wont boot! My unibody macbook wont load up OSX, only windows. so I loaded up the Snow leopard disc to try and fix the install but it did not even see the osx partition. It only shows my windows partition. Inside of Disk Utility it has the mac partition labeled as disk0s2 and it is grayed out/not mounted. Repair/verify did nothing (it fails and says it can not repair). Also manually mounting the partition in terminal does not work either. Any one have any ideas?