Você pode alterar seu nome de usuário com muita facilidade, indo apenas para Applications -> System Preferences -> Users & Groups
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Se você quiser alterar o nome do seu computador na sua rede, vá para Applications -> System Preferences -> Sharing
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Mas, se o que você deseja é alterar o nome da sua conta (ou seja, o nome da sua pasta pessoal), isso é um pouco mais complexo. De acordo com este artigo , você pode fazer essa solução alternativa (Mac OS X 10.5 ou posterior):
- Enable the root user.
- Log in as root.
- Navigate to the /Users folder.
- Select the Home folder with the short name you want to change, and rename it just like you would rename any folder. Keep in mind that the
account name must be all lowercase, with no spaces, contain only
letters or contain a mix of letters and numbers, and it cannot be the
same as an existing user's Full Name.
- Use the Users & Groups pane (Accounts pane in Mac OS X v10.6.8 or earlier) in System Preferences to create a new user with the Account
name or Short Name that you used in the previous step.
- Click OK when "A folder in the Users folder already has the name 'account name'. Would you like to use that folder as the Home folder
for this user account?" appears. Note: This will correct the ownership
of all files in the Home folder, and avoid permissions issues with the
contents.
- Choose Log Out from the Apple menu.
- Log in as the newly created user. You should be able to access all of your original files (on the desktop, in Documents, and in the other
folders of this Home).
- After verifying that your data is as expected, you can delete the original user account via the Users & Groups pane (Accounts pane in
Mac OS X v10.6.8 or earlier).
- Disable the root user.