Annoying trouble with my brand spanking new, seriously powered, 16 GB-filled, 512 GB solid state drive, 15″ of glory display, MacBook Pro with Retina Display. Attempted to migrate data from my 13″ MacBook Pro (mid 2012) as part of the first time startup sequence, but because I had already updated the 13″ MacBook Pro to Mavericks 10.9.1 the data could not be migrated until I had similarly updated the MacBook Pro with Retina to the same or higher (there is no higher at the moment).