sudo -s
type password
diskutil list
locate efi partition disk #
newfs_msdos -f 32 -v EFI /dev/diskXsX
Windows 10 see http://woshub.com/how-to-repair-deleted-efi-partition-in-windows-7/
Erase and format EFI partition
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sudo -s
type password
diskutil list
locate efi partition disk #
newfs_msdos -f 32 -v EFI /dev/diskXsX
Windows 10 see http://woshub.com/how-to-repair-deleted-efi-partition-in-windows-7/