You’ve just purchased a new Mac that has Lion (OS X 10.7) installed and want to transfer your data and programs from your older, Snow Leopard computer. You connect the two machines using a standard firewire cable and start up the Snow Leopard Mac in target disk mode. Then, you open up Migration Assistant in Lion, where you struggle to decide what to do, for target disk mode no longer appears in the descriptive text.
According to another consultant who encountered this dilemma, the first option, “From another Mac or PC,” appears to apply to situations where the two systems are on the same network (wired or wireless) and that data would be pushed from the old system to the new.
If you want to transfer data using target disk mode, choose the second option, for a Mac booted up in target disk mode is now considered a disk.