My username and home folder name on my old MBP (Lion) were [Forename Surname] and [Forename] respectively. I then created the same username/home folder name on my new rMBP (Mountain Lion) and used the Migration Assistant to transfer files via a Time Machine backup. However, it couldn't transfer them onto my new username/home folder account because the new one was the same as the old one, so I just renamed the home folder to [Forename1new] to transfer, not realising it wasn't easy to change back, and now I want to change it back to what it should be, but am unable to. Can anyone help with this!? Very frustrating.