Funny story. I have added new hard drives to 10s of mac laptops over time. Last week I added one to a 12' for the first time. It was so nerveracking for a first run (28 screws in a small space), that I was frazzled when I got it back together. I booted OSX DVD and went to intsall and....nothing. I panicked and assumed I had missed a connection or had a bad drive. I was not looking forward to taking it apart again. I took a drink and sat for 15 minutes before I realized I had not partitioned it! So I was in your shoes this time last week !!