This simple guide is the solution for those that don't have a working superdrive (uj-8a8 in my case) and are getting the error "no bootable device" when bootcamp tries to reboot in (a sort of) legacy mode. Before doing anything BACKUP your data. Do NOT attempt any kind of operation if you are risking to lose important data or you are afraid to corrupt your actual osx installation. Make sure that you have an USB with your osx Installer or a network connection from which recover the OSX system Make sure that you have at least an 8gb USB Drive (I suggest a 16gb thumb). Download Windows 10 from the microsoft website. You need a Windows Operating system to download Windows 10 from the Microsoft Website https://www.microsoft.com/en-en/software-download/windows10 (english) https://www.microsoft.com/it-it/software-download/windows10 (in italiano) Create your Windows 10 Installation USB Pendrive (or disk) with the tool that you prefer. For mac osx or other Operti...