**Deleting the Windows EFI Boot Entry** > This is the most accurate and I have succeeded! First, you’ll need to locate the EFI partition, which is where your Mac stores information about what operating systems can be booted from your Mac. In the Terminal, type this command: diskutil list You’re looking for a partition on your main hard drive called EFI. /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk1 500.1 GB disk0s2 Once you find it, enter these commands one at a time: sudo mkdir /Volumes/EFI Next typing: sudo mount -t msdos /dev/disk0s1 /Volumes/EFI Replace /dev/disk0s1 with the correct partition you located using diskutil. Typing Terminal: cd /Volumes/EFI/EFI Continue typing Terminal: ls At this point the list may appear as Apple, Boot, Microsoft. Delete the Windows EFI Boot entry by typing this into the Terminal: rm -rf Microsoft rm -rf Boot And unmount EFI, typing Terminal: sudo umount /Volumes/efi MacOS High Sierra can type is: sudo diskutil umount /Volumes/efi Restart your MAC and done!!!!