Hello, I have MBPR 12,1 (early 2015 13" mbp retina), with os x el capitan and debian wheezy. I want to install windows 10 (or earlier version) on it. The problem is that bootcamp requires a one single partition disk, that I currently don't have. An option could be making an exact copy of my debian partition on a key, and re-copy it after. But i never did that, i'm not sure it will work, with the linux swap etc.. I don't know the exact commands, because maybe some things have to be done to make it work. I'd prefer to avoid. So, basically my question is, how to install windows 10 on this machine without any use of bootcamp ? -Driver : i guess i'l need the bootcamp drivers : where find them and in which folder of the bootable usb key i should put them ? -EFI : where find an efi working folder for a bootable usb key of windows 10 for mac ? I hope i'm in the right place, if not, can you advice me some board please ? You would say i should use vmarefusion or parallels, but I need the USB slot to work... Thanks Edit : my first updates are that eventually windows 10 need more bootcamp that we could think. Maybe it use some bios virtualisation to run windows. win7 seems to be easier to install on mac machine without bootcamp.