Could not install boot loader - help please

So I burned tumbleweed (“openSUSE-Tumbleweed-DVD-x86_64-Snapshot20151022-Media.iso”) to a USB drive using my OSX machine and this guide. I powered on my computer and booted from the USB drive. Started installation and all went well until 96%. I got an error alert which described an “error installing boot loader” and gave me the option to try another configuration. I tried every reasonable configuration possible and every time it reproduced the same error.

I’m not sure what to try next, so I’ll be grateful for any help! :slight_smile:

Please note, the computer I’m installing on is a Toshiba Satellite pro l670-189.

Thanks for reading,