I wish to reset my Mac from a PC operating system to the factory setting for Mac.
I wish to recover my Mac from a PC operating system (converted for business reasons) back to Mac system.
Windows, Windows 10
If you have no Mac operating system installed at all, you'll need to boot into Internet Recovery and erase the drive completely, then reinstall macOS.
How to reinstall macOS from macOS Recovery - Apple Support
Section 2. has a link to information about erasing your disk.
