I'm sure there are multiple ways to skin this cat, but what's the "best practice"? Scenario: Currently have old Macbook running Snow Leopard, w/ Time Machine backups. File Vault on. In a couple months or so I'll probably buy a new Macbook Pro and let my young son have our old Macbook. Complications and questions: I have 3 users on the Macbook. An admin superuser I only use for installs and software updates, a standard non-admin account for me to use, and a restricted account for my son to use. My desired end-state is this: New Macbook Pro (with Lion) now has my superuser account and my personal account New Macbook Pro has all of my documents (docs, Itunes, iphoto, etc) New Macbook Pro has all of my software, EXCEPT for versions of stuff that's newer in Lion. Old Macbook no longer has my personal account and files, but does still have my son's. Time Machine backup disk now "belongs" to the new Macbook Pro and contains a full backup of THAT SYSTEM, including Lion OS, not Snow Leopard. Or, alternatively, it belongs to my son's and I get a new one. What the heck do I DO, and in what order?