Error: could not get license agreement
Ok, the installer was indeed broken, when I ran it directly it would start downloading the setup from the internet without letting me know that it is downloading. Checked that with Activity Monitor > Sort Activities by the Network column. Also, double check the size of the .app file you get from someone. I copied the setup from local area network so something might have gone nuts.


  ^ These are some tips in such a case.


Copy the installer again or download it and the above commands (in the question) will work like a charm.