Hi, I just bought and installed a new superdrive into my macbook pro 15" mid 2010. On Safety mode (cmd + R) it recognises the drive in disc utility and allows the eject function. However, when the mac is on in normal mode, it does not recognise it. in System Information, it shows up under "Serial ATA" but not on DVD etc HELP! I'm convinced that this is a firmware thing because the drive itself is new and appears to be working fine is safe mode. Adam.