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Click Continue to start the transfer. Large transfers might need several hours to complete.If you replace, the old account will delete and then replace the account on your Mac, including everything in its home folder. If you rename, the old account will appear as a separate user on your Mac, with a separate home folder and login.
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In this example, John Appleseed is a macOS user account. If it has the same name as an account already on your Mac, you're prompted to either rename the old account or replace the one on your Mac.
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I’d go the USB 3.0 or higher route so things run a bit faster. I imagine you own both Mac OS and the drive. We’ll be using Unibeast, Multibeast, and the Clover bootloader. I used Time Machine to make the back up copy. First things first you’ll need a Mac running Sierra and at least a 16 GB USB thumb drive. For example, if your Mac starts up to a flashing question mark, you need to first reinstall macOS. I am using Mavericks and I have an external HD connected on which I have a copy of the OS with all my files. All releases from Mac OS X 10.5 Leopard and after are UNIX 03 certified, with an exception for OS X 10.7 Lion. If you need to reinstall macOS, do that before continuing. The first desktop version, Mac OS X 10.0, was released in March 2001, with its first update, 10.1, arriving later that year.
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