hdiutil convert not working and not telling me why I've been trying to create a bootable Ubuntu flash drive following instructions from multiple sites. I need to convert the .iso file to an .img using hdiutil. For starters, the syntax of the command is very unclear. The ubuntu site and the -help option of hdiutil say hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso but the man hdiutil says hdiutil convert ~/path/to/ubuntu.iso -format UDRW -o ~/path/to/target.img. I have tried both ways and neither has worked. I don't get any sort of error message, and I know my paths are correct (when I try with an incorrect path it says so). The only thing printed in the terminal is

Usage:  hdiutil convert -format &lt;format&gt; -o &lt;outfile&gt; [options] &lt;image&gt;
    hdiutil convert -help


Does anyone have any suggestions?
Use ETCG drivemaker file, much easier.

Heres the link:
https://www.youtube.com/watch?v=IQIaDO9nR6Y&amp;t=421s