Chosen Solution
Hello everybody, I am having a very weird problem with my MacBook Pro 15’’ Mid 2009 model. I recently damaged my hard drive, so I decided to buy a new one, which is exactly the same model as the one that I had. A Seagate ST9500420AS 500 GB 7,200 rpm. Now the thing is that, although my previous drive is damaged, it can still be recognized by the disk utility when I boot from the Snow Leopard Installation DVD. On the other hand, for some reason, the new one is not recognized by the Disk Utility! What’s more, I connected an older hard drive that I had, with Leopard installed in it and still it doesn’t recognize it. But If I connect it to the USB, it recognizes it and it can boot normally to MacOS…. Isn’t it weird? To recognize only the damaged hard drive? Does anyone have any suggestions? I am dying to get my laptop working because I have many things to do this period. I appreciate your help. John
So, to recap, USB works, but internal doesn’t? It may be the Hard Drive Cable thats doing that… If not, its the logic board and it’ll need to be replaced so lets hope its the cable.
Downgrade to EFI 1.6 instead of 1.7. In 1.7 Apple has removed support for many 3rd party HDD and SSD drives. Had same problem with OCZ Vertex 4 SSD, and found this solution in forums there.
