On Saturday, January 21, 2017 2:43:54 PM CET Rafael Lauda wrote: > I have installed rEFInd on my MacBook Pro
rEFInd is unnecessary, you can have a dual boot system without it. I have installed Debian on a MacBook Pro 12,1 without rEFInd. > and I have installed the iso image for Debian 8.7.1 1 onto a DVD-R. > When the computer is turned on the dvd does not show. Have you tried to press the "Command ⌘" key while turning on the MacBook with the power button? A screen offering different boot options (e.g. MacOS on disk, debian installer on DVD) should be displayed.