I am trying to install Ubuntu 16.04 alongside macOS sierra on MacBook Pro 2015 Retina model.
I have installed rEFind and made the USB stick. When I tried to boot it from the USB, I got this error:
Not Found while loading legacy loader Please make sure that you have the latest firmware update installed ...
And one suspicion is when I made the USB stick, I followed the manual approach stated by Ubuntu Wiki. (it was using terminal and something called "dd"). After the last command, I got this:
Any help will be appreciated.