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Q: user name
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Feb 21, 2016 7:53 PMby Barney-15E,Change the account name and home directory name on your Mac - Apple Support
However, if you are wanting to change the name because you bought a used Mac, then you should erase the disk an reinstall the OS because you have no idea what the previous owner installed. If you trust the previous owner, just create a new account and delete the other account.
