The boot drive's format and partition structure can be checked both in the OS X graphical interface and in the Terminal. Topher, an avid Mac user for the past 15 years, has been a contributing author ...

All this is assuming you can still boot into Windows 11/10 in a regular way. If you cannot, the only way is to use a bootable USB drive. You can then use the advanced recovery. Reset Windows Format ...

When using Boot Camp Assistant on your macOS, if you receive an error saying — Please format the USB drive as single FAT partition, then this post will help you ...