I purchased a refurb early 2008 MacBook last week and received it yesterday. Before I even booted the thing up I replaced the stock RAM and installed a larger Western Digital hard drive, the following model: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136197 I booted the machine from the install discs, but disk utility does not recognize the drive at all to give me the opportunity to format it. It doesn't appear in the available volumes, however, Apple System Profiler recognizes the drive attached to the SATA bus and reports the serial number. Any ideas? Could it be a bad drive? I've seen other people comment about successfully installing this model in a MacBook. I'm frustrated because I want to play with my new toy!