I have a shiny new Late 2013 Mac Pro and am trying to install the SLES SAP build on. The install hangs on boot at the "loading initial ramdisk" spot. I did find a lot of posts on this subject but the one that seemed closest in relation in setting "nomodeset" before letting it start the install ends with the same outcome.

Are there other debugging steps I can perform to figure out what it's doing/not doing here and get past this part of the install?