This is curious. So I made a boot USB, wiped my drive in my rMBP and installed 10.8.3. All was fine until I wanted to tell OSX to get all my files from my Time Machine backup. Neither the installer nor Migration Assistant want to use the backup created just a short while before. Luckily it is available on both my time capsule and another FireWire drive, so I'm sure it's good. Both the installer and Migration Asssistant can see time capsule but just pause (not hang, but not do anything either) when I select it as a device. As for the FireWire drive, it shows up in the recovery partitions 'restore from backup' feature and on the desktop, but it will not show up in any form of migration (in the installer or in Migration Assistant). Now have tried the installation of 10.8.3 several times, and tried restoring from several devices including USB. In a nutshell, anything to do with Migrating cannot see any form of drive... I've never bad this before, done the same process since leopard and never bad this. I'm gonna try re downloading the installer and making a new USB boot drive to see if something went wrong there. Any advice really welcome!