macOS Sierra installation on Local drive (C:)

[schaheev]

Hello. I have one and only HDD on my laptop that is divided into 2 local Drives (C: ) and (D: ). (C: ) is obviously where Windows 10 is installed. So my question is: can I install Sierra on (C: ) instead of Windows with saving all the data on (D: ), or does erasing and formatting mentioned in the guide mean formatting the whole of the drive? Thank you.

 

[Going Bald]

Depends. Verify if Win10 is installed UEFI mode or Legacy mode. If UEFI, erase. If Legacy, reformat.