Install macOS on different hard disk

Hi everyone, my friend just sent me an old laptop comes with a 500GB HDD only, Win10 already installed and he wants macOS @@. So i tell him to buy a 120GB M.2 SSD and install macOS only on it. But im still confused one thing, at Erase Disk step, will Disk Utility use the exist EFI partition created by Windows or it will create another EFI partition (means there are two EFI partitions, one Win, one mac)?
Thank you very much.

submitted by /u/horikitarin9250
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