Migrate time machine data stored on external server (DROBO) onto new iMac 3.2Ghz
You might need to force Time Machine to browse for backups on unsupported volumes (ie Drobo)


Open Terminal
type the following command


defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

In case you cannot access the terminal during the first startup, create a dummy user (you don't want to duplicate the username in you backup), then open terminal, do the magic trick and start Migration Assistant from Applications/Utilities/