MacBook Pro (13" Mid 2012). Upgraded to macOS Sierra. Booting with option and selecting Recovery-10.12 works. Booting normally (turning the MacBook on and not pressing any keys), starts rEFind version 0.10.4. Multiple icons appear. Selecting any icon works properly, except for the one with the label "boot Mac OS from Recovery HD". In this case booting starts and the Apple logo appears, the "load bar" indicates approxiametely 60% complete, and then the circle with a line appears.