Creating Bootable USB with live DEBIAN on MacBook Pro


I have attempted to create a bootable USB with a live DEBIAN image on my MacBook Pro. After about 20 different attempts I have had no success including with Etcher. I have downloaded DEBIAN-live.9.5.0-i386-cinnamon.iso because I want to boot my older iMac from the USB stick. I am never able to come up with a bootable USB drive with DEBIAN. I used the CLI to convert the .ISG into a .IMG and use Etcher to flash the USB.

Etcher indicates that all has worked well and no error messages are received.

I have been able to create a bootable recovery image on the same USB stick. Any comments or suggestions would be greatly appreciated.