Liz_Atems_elisatems Thanks for the clarification. It seemed a bit of a stretch to enable the root account, and at least in the UI, it appeared to be just another admin account. I was a bit surprised it was even possible. At any rate, it seems you need to create another admin account to make the change without hosing the currently logged in account. In use files would probably be locked as well, which would prevent a clean home directory clone.
Out of curiosity, when you refer to ditto as ditto(1), is that a nickname or some syntax I'm not familiar with?
In a standard -nix distribution, if you own files on an external volume and move that to another computer, how do you establish that you own them? Do you configure the two computers to share the same user database, à la Active Directory, or do you have to access them from a user with the same index number? And are the index numbers consecutive or random? I don't have much occasion to muck about with the -nix command line (or even the Windows command line), but I'm curious about how these things work under the hood. And yes, OSX is heavily tweaked BSD, if I remember correctly.